I'm concerned about the chamber cooling off and warping prints with the lid off.  Fortunately, one kind soul has designed a top-mounted spool holder for the Press

I actually tried that type of top-mounted spool holder, but the filament twisted anyway: I think the problem comes from feeding it through that hole in the lid. My side-mounted filament holder (shown previously in this thread), or any side-spool-setup, seems to do the trick.

Also, I have been printing with the lid open since yesterday, and I haven't noticed any deleterious effects. In fact, some people have recommended it because the Press doesn't have a cooling fan, and opening the lid allows for some cooling of the part as it's printed.

I'm concerned about the chamber cooling off and warping prints with the lid off.

With adequate bed heat and adhesion, you shouldn't experience warping with the top open. Many find that keeping the top down increases heat build up in the extruder assembly, leading to the jams.

I do suggest you keep the front door generally closed, as having it open allows for too much free airflow between the top and front, which is probably too much.

Overall, for many prints, it probably doesn't matter what you do, so feel free to find what works best for you.

If you guys aren't using solidoodle filament you can just remove the whole filament holder out.

That is a very good idea. I just did that, and I think I like it, although I'm still going to prop up the lid so the filament can move back and forth.

Drill a 1/2"+ hole and the filament moves fine. Smooth out the edges of hole or use a rubber grommet.

If you guys aren't using solidoodle filament you can just remove the whole filament holder out.

That is a very good idea. I just did that, and I think I like it, although I'm still going to prop up the lid so the filament can move back and forth.

Honestly, it's simply because I don't have enough desk space for a free standing spool holder.

Now there's an idea....

My solution, which is similar to yours, survived a 16 hour print. As long as the filament isn't too tangled, I think we've both nailed the ideal filament feed solution.

For the sake of discussion, why do you prefer a velcro mounted solution as opposed to a free standing base sitting next to the printer?

I am also happy for you that you're not seeing tangles with the filament allowed the free roam the entire edge of the printer, but I am continuing to use a clip which forces it through one spot only in the hopes it will be more robust with cheaper filament types that are more prone to tangling.

I do have 1 roll of filament from China that is seemingly pre-tangled on the spool. The only solution is to monitor the print, and manually unroll and re-roll several lengths of filament to forcefully remove the tangles.

You could reduce the print time of that to about 30 minutes if you make the two posts separate parts that snap or bolt into the base.

Now there's an idea....

Here are all the files for that toilet-paper-style spool holder. It took about 4 hours to print at 0.3mm resolution.

http://www.thingiverse.com/thing:753147

You could reduce the print time of that to about 30 minutes if you make the two posts separate parts that snap or bolt into the base. It will also be much stronger - I anticipate this could fail because there is some torque on the layer lines.

Here are all the files for that toilet-paper-style spool holder. It took about 4 hours to print at 0.3mm resolution.

http://www.thingiverse.com/thing:753147

Thanks, looks very good and simple!

http://www.thingiverse.com/thing:753147

My 4-hour print is finished: I printed a side-mounted, perpendicular-spool holder, and I think this will be the winning design. I printed this holder using that jury-rigged holder made from an L-square and a clamp, and that orientation worked great, so I have high hopes for this new holder. I can upload the STL files if anyone wants them.

You should load them on Thingiverse and link here. Lots of people will want something like this.

My 9 hour print finished with no issues! This is using the same filament which fell off the spool during my attempt 2 nights ago.

I am now using the same kind of spool orientation that you have; with the spool oriented this way, loose loops of filament don't fall off the side of the spool.

I did still have issues with this approach. The Press clip I added is tight and doesn't move at all, so the filament will not fall off the spool at all, regardless of how much it twists or has tension inside the printer. Perhaps high tension inside the extruder would cause it to twist slowly in the right direction?

The real test comes tonight - I'm 2 hours into a 9 hour print. So far, so good. Fingers crossed!!