Thanks Fogman for your reply.

Of course I could store the mass of an object in its skill for later retrieival, logical answer. One I hadn't even thought about doh!

Still I wonder if there could be a quicker way to do this, maybe Get_Mass would be a valuable addition. Still your simple solution will do the job just as well. Thanks for that.

I noticed some strange behaviour during events, where the my handle is empty during impact / friction etc. Maybe this is a bug or my code is screwy? My guess the later... It certainly gave me some problems in collision detection earlier...

I've noticed the last few posts about physics I have read mention functions, such as ph_check_distance, which I have not come across in the manual I have, is there another refernece resource for Physics functions im missing?

Im runnin GS Pro 6.40.5 and I will double check latest manual now.

Really appreciate your help Fogman

EDIT: I've just downloaded the latest beta manual for 6.50, maybe it will have some insights into the PE