Trimming one solid with another... Not happening

[v1406]

Here's another demo that may be of some use. It shows one method for locating the smaller cylinder in the middle of the larger cylinder, and also a bit about subtracting/slicing.

 

 

 

THANKS THANKS THANKS. This is exactly what i wanted to do but always failed. I thank you once again for the clear and concise videos uploaded by you. I am lucky to have joined this wonderful forum. God Bless you.