I would be very careful about mounting a pole without a compression
post. Keep in mind that your genny is pulling upward on the crossbeam and the crossbeam rigging
is transmitting that force into compression
on the crossbeam as intended. A screacher pole, by constrast, will be trying to push the crossbeam back towards the mast
, particularly if your whisker stays are led aft to the same bulkhead as the crossbeam is attached to. This will be putting unopposed forces against the middle of the crossbeam. The longer your pole the greater these forces will be. Remember, the crossbeam is what keeps the mast
out of the cockpit
, you don't want to put it at risk.