Maybe not exactly what you want but who knows...

As Moi Export SKP format you can use the Free BricsCAD Shape

https://www.bricsys.com/en-us/shape/ and you are full BIM compatible! https://www.bricsys.com/en-us/shape/path-to-bim/

It has strong engine for Fillets, Boolean and cool direct modeling functions :)

A curious ergonomy...all can be possible with Right Click /Context menus...

thanks pilou,

looks like it has a nice interface. however, Atom3D is probably the closest to what I want in features and cost. I'm using Mecway for FEA. The developer said he is going to add inertial properties in the future. If he does that, I won't need Atom3D. So I'm going to wait for now. I found two solutions to convert a stl to obj without retopo. That may be enough for what I need. 3DCoat may not be needed. But if the hobby version has retopo I may check it out in the future. So I think I answered my questions here. Thanks to everyone for the input.

One interesting thing I found. Ashlar Vellum and Atom3D both use the ACIS kernel. But they are drastically different in prices. So Ashlar is just charging more for no particular reason. I thought it might have been due to high licensing costs. But that isn't the case. I think ViaCAD is also using the ACIS kernel. Same with TurboCAD. TurboCAD and Atom3D are both options. I've used both many many years ago.

fyi to anyone seeing cg, inertias, mass etc...

looks like the low cost version of Atom3D will do this. however, you have to buy the expensive version of TurboCAD to do the same. I couldn't find any information for TurboCAD. I had to get in touch with them. So not really even sure how good it would do this task. There are videos for Atom3D / Alibre. Which show that it does the task well.

https://www.turbocad.co.uk/windows-range/compare-versions ? Not sufficient infos ?

thanks. the us site hasn't been loading for me. but i talked to them and they daid only pro has mass properties. the weird thing is before i talked to them i looked in the user manual and they aren't mentioned

About BricsCad Shape shown above :)

Funny one but you must make a little training! :)

Direct modeling is cool and Fillet, Chamfer, Boolean some strong!

Moi to Shape is easy by SKP format inbetweener

Render of course SimLab Composer lite (free)



PS If you export as DAE to SKetchUP, seems there is a bug even both programs are in unity meter!
You must scale * 1000 in Shape before the exportation!
else you will have some faces no filled!

New free version 20.1.06
https://www.bricsys.com/en-us/shape/

Compatible with Moi by SKP format in import So Textures and furnitures for your Moi Projects...
Bim access https://www.bricsys.com/en-us/shape/path-to-bim/

No Plugin as SketchUp : all is inside :) Strong Fillet, Boolean...