aerobatixkid, On the rods, You push the unthreaded end into the nylon
tube up to the threads on the other end, then screw it in about 1/4", then
screw on the link on the remaining threads of the rod... But as fred123
said they do require retriming for temp. changes, and are a bit flexable
... I replaced mine on my 4*60 with C.F. rods and used the same outer
guides, It was a BIG difference!!... If you do go with metal rods, IMO I
would go with 4-40....