Quote Originally Posted by irving2008 View Post
thermal expansion... normally you drive the fixed end and the floating end can move to accomodate...
cheers irving... i need to do some research on how much exspansion i might get... my couplers are the slitted aluminium type and will allow for some exspansion

iv designed a slight error into my build and driving the floating end might let me get away with it without to much of a re-work