Hi Hendrick,

To try and cover your points in sequence:

The O-rings on the lever - on my rifle they did not touch the underside of the moderator when in the closed position, so IMO not vibration dampers. The 'mushroom' on a TX serves to prevent the lever over riding the detent and marking the underside of the barrel assembly.

Not sure of cocking lever o/d off the top of my head, will check it and report back, but visually looks in the same league as the o/d of the TX200 & HW77/97. There is ample space for an after market cocking aid to fit if required - see pictures above.

Longevity of the o-rings on my lever - probably pretty good as one of the first thing I did was remove them and put them in my box of odd bits. Seriously they seemed pretty hard rubber.

Barrel / breech zone - I don't see why it should be prone to snagging or losing bluing under normal usage.

The colour of the alloy components - best see pictures above as there are close views of the visible portion of the trigger housing and the muzzle assembly.

Weight and balance to my mind comparable to HW97K.