i am finally getting to the BUD project and i have lots of questions. i am replacing the old lnbf with a new c/ku
BSC621. when i took off the old one i was careful not to disturb too much of existing positioning of arms and was pretty successful. my question is: the BSC621 has two sets of screw holes to attach to arms and was wondering if there was a difference? which do i use or does it matter? any tips on this procedure would be welcomed.