Both were printed at 2.5 layer height and sliced with Slic3r 1.1.5 with all the same perimeters besides support. The left has support spaced 2mm with 3 interface layers.  The right side object has only custom support made in MeshMixer. I haven't had the time to try slicing in MeshMixer yet.

The first image is the object in MeshMixer with some custom support that took me just a couple minutes to add. Would have been seconds if I was more familiar with the program. The support took no time at all to remove with a razor, and did a very good job for this test print.

The left object had way too much support, was very difficult to remove, and basically ruined the print. I wouldn't be able to insert the GoPro without additional cleaning. I could make a better print if I played with the settings, but the MeshMixer mount came out so well I don't think it would compare.

If you do decide to give MeshMixer a try I strongly recommend resizing the object before doing anything. I went with 10% and it processed alright. When I try doing support on a full size object I've had it take up to 20GB of RAM and like an hour to analyze the object before I could begin. Reduced it doesn't take much time at all and I have a pretty fast machine with 32GB RAM.

* Don't really like it compared to my normal Octave, but it was half the price so why not give it a shot. Going to see if i can get better prints with it. If not I will probably buy it just for test pieces.

dissolvable support material would be sweet

Ahh, if only I had a dual extruder printer with one head set to print dissolvable support material!

The object I was printing is a custom GoPro mount for my skydiving helmet. Made it to match the curvature of the helmet, reduce snag hazards, and a cutout to allow my visor to open fully.

Apparently some applications consider Y up/down and others Z so the program allows you to choose under View/Config/Flip Z-Y On Import/Export.

Here's something I am printing right now that used Meshmixer support in the center.

For example I have been playing in Daz3D studio and I trying to bring something into meshmixer to check it's overhangs as an example. Meshmixer bring it in upside down and I haven't figured how to make it analyze it right side up.

I really hate printing with support and I am trying to keep my overhangs not overly bad.

I would really like to make a 3D printable Werewolf (using paid 3d models from that DAZ store since I can pose them) without support and I haven't found one elsewhere yet. Maybe something along the lines of ysb/fantasygraph models but gothic tones such as Werewolves and Vampires. etc. Of course his are awesome and it would take me some time to come even close!