as low as you can possibly set it. If you can get lower than 80C I would do it. And keep an eye on things - have heard of the spools deforming.

Raised hand here..

I had mine at 80. Put the filament in for 4 hours as a website advised. Filament came out fine, but the side of the spool that was on the rack turned all wavy... I can no longer use that spool on my edge riding on bearings spool holder.

I would suggest maybe putting the spool/s on a cookie sheet. May not warp then.

temp really does depend on the printer/hotend setup. On my first SD4, stock hotend, I could run ABS at 185-190 with no problems and PLA was in the 160-165 range, second one is similar in temp range with the stock hotend, with only minor differences (+/- a degree or 2)

On the filament - you may want to try baking it at very low temp for a couple of hours to dry it out, and when you aren't actually printing, put it in some sort of sealed, airtight container with some desiccant to reduce moisture absorption. Large zipper type storage bags may work (double bag it) depending on spool size. If you have multiple spools, like I do, go find a container large enough to hold them all that is airtight. Ziplock makes some really nice ones that come in several sizes. Iris is another brand - same basic boxes.

That stuff is all on my agenda to do. And I have a couple of other ideas relating to that.

With oven baking? How low sort of temperatures? 80 deg C?

On the filament - you may want to try baking it at very low temp for a couple of hours to dry it out, and when you aren't actually printing, put it in some sort of sealed, airtight container with some desiccant to reduce moisture absorption. Large zipper type storage bags may work (double bag it) depending on spool size. If you have multiple spools, like I do, go find a container large enough to hold them all that is airtight. Ziplock makes some really nice ones that come in several sizes. Iris is another brand - same basic boxes.

I am going with the temperature too high as well. That is still looking like over-extrusion. With everything calibrated correctly, too high a temperature can cause that. I know the recommended temperature for ABS is 220-240 degrees C. However, Solidoodles are notorious for displaying temperature wrong. Such that, most of the time when I am running ABS my temperature is set around 200-205, and PLA can go as low as 175, but usually 185-190 to work best.

On the weekend I'll spend a bit more time on it. I was suffering really bad from delamination from being too cold (at sort of 210-220 temps).

Also would a Hobb-Goblin help? Is this still an filament/extrude resolution issue?

I would recommend the Hobb Goblin even if everything looked good
It would help resolution for sure, but I can wager your temp settings are still a bit high. I've been printing black ABS at 232c recently. So 235 for white seems like it may be a little much. However, it does not look like temp is entirely to blame. How old is the filament? Have you tried baking any potential moisture out?

Moisture will be a constant battle, is winter here, so a bit damp and humid.

in your first 20mm cube pic, it looks like little popped bubbles in several places - that indicates moisture in the filament.

not really sure what to say about the 0.2 layer height cube... the single wall piece looks good, but the cube - not so much.
a bit of backlash perhaps? are the belts tensioned evenly? no slop? i dunno...

0.3mm Single Wall

20mm cube

I thought I might try and give 0.2mm a go. As I want to get up to to that resolution.
0.2mm Single Wall

20mm cube

Might still be running the filament a bit too hot? Still running at 235.

Also would a Hobb-Goblin help? Is this still an filament/extrude resolution issue?

Thanks for the help so far.

I'm running 0.4mm nozzle. Should I just set it to 0.48 across the board, including the couple set to 0 (such as the 2 infills).

and maybe try changing the temp just a little? I have found that the light colors like it just a little cooler than darker colors...

also, what size nozzle are you running on that E3d? if it is the stock nozzle (0.4), default extrusion width should be 0.48, not 0.42