Contact (via personal message) pontiac on this forum as he recently bought a Rohm Twinmaster Top and might be able to give you his thoughts on it (don't worry he's as wierd as the rest of us). The HW40 is nice and light weight (but i found the cocking was irritating- felt like it would try and remove skin given half a chance). Beeman do a copy of it at a cheaper price (non fibre optic sights and slightly inferior finish).

And i am working; it's just that every time i try and work on a gun leaflet, the phone rings or someone comes into the shop. No disturbance while i'm on the forum, strange.