im working on an external crank support for a new combo. This has a mandrel coming off the front of the blower pulley to spin a belt drive pump. The blower pulley is also a little farther from the front main than a BBC. I’m a little worried about the stiffness of the crank support so I added a diagonal link with an adjuster in it thinking I could maybe preload it a little in the opposite direction of the belt. I can’t pull a belt right yet but decided to see if I could measure any deflection at the end of the mandrel by preloading my adjusters. Too my amazement I can crank the mandrel down about .010” I guess I could just be measuring the crank moving around in the bearings magnified by the long snout and mandrel. Anybody ever measure crank deflection when pulling a belt tight? I run 8mm and pulled it pretty tight on the last combo to keep it from breaking the belt. Like <1/2” side to side cold which would get down to just about nothing when hot.