Is it okay to ask for test stitching help here? Or is there somewhere else I should post?

Ask for testers,tell them what you need and have them pm you. Then you can respond back and forth one on one

Post your request for testers.
You may want to state the type of designs you need tested.
Let them know if you need photos of the stitch outs and their comments on how the designs stitched etc.
Ask anyone interested to PM you.
Then you can answer the PM and ask for their email address to send the designs to them.
Hope this helps you.
EastWitch2

This is the place. Anything embroidery/sewing/craft related. ;)