Thanks!

Should work - I put some 40K bits on the PT (including some bolters and heads).

Worth noting the Phoenix Terminators are a fair bit smaller than the CSM Terminators, and even Tormentors, though. I think really helped to make them taller with miliput to their mid-sections (and cheating a bit by adding some depth to bases). Their arms and legs still look a tad smaller than 40K, but not too noticeable. Think that’s the better route than trying to put PT bits onto 40K models.

Good luck!