[Marwan]

the hf2 has an open muzzle but will only accomodate one circular band, the other band will be a screw in band, so im not sure i like this, with the rabitech the open muzzle allows 2 circular bands...so its a neater setup,
do you need a double band setup on a 90 gun? what are you shooting?
the omer bands are generally soft, i mean the omer 18s are quite easy to load...compared to some of the other stiffer bands like the demka for example....
i suggest you try it forst with the original setup then take it from there...