Not sure why you have to keep taking your PS apart Barry? I've only ever had mine apart a handfull of times in the many years I've owned it and that was when I fitted a tuning kit to it, I haven't had to touch it since and I haven't opened her up in nearly ten years, I've never had a problem with the cocking lever and mine is a very early one with the short stroked action from the factory, the only "upgrades" I've done apart from a Welsh Willy tuning kit and a Vortek "O" ring head are putting it into a later walnut stock and fitting the two extra side bolts to hold the action in the stock.
One of your photo's is very deceiving as it looks like if you take the rear bolt out that holds the trigger block in the alloy mounting rail under the main cylinder comes away as well (I know you haven't implied that's what happens but it could look like it does) as for the bolt that holds the cocking linkage to the compression tube, why you keep removing that is beyond me, you don't need to, to do a spring service or even to replace anything on the piston (yes it helps to take it out but you don't need to), I did read many years ago about that bolt coming loose but I Loctited it in just in case and it hasn't moved since, I really don't see what all the fuss is about regarding the cocking lever being uncomfy, fare enough I don't use it as much as most others would on here but when I do it still astounds me how it manages to put the pellets where I want them to go without me even trying (it's like the Firefox of the airgun world, just think what you want and it does it) it's that bloody good and if you had one like mine then you would understand why you don't need no Weihrauch
Pete