yh but i wanted to get the cp flame drop know any good on off asa's that are compatible with itJust had a thought, the ION XE has the duckbill ASA (the bit the bottle screws into)
I would recommend replacing that with a Eclipse 09 OOPS and mini rail.
The OOPS and rail will decrease the gap between you and the marker by about 1.5 inches roughly.
You will also have the advantage, of being able to turn the air on and off, without disconnecting the bottle from the marker and purge remaining air in the macroline/front reg, before removing the bottle.