Bob,

For me, the HW45 is incredibly hold sensitive.

Only the loosest & most gentle of grips brings repeatable grouping (for me).

I have built up the front strap with blutak to give a flat for fingers - essntially the pistol sits in/on the hand, but not gripped by it.

The innards of my HW45 are run totally dry - a mix of tungsten disulphide & graphite powders (75:25) provide the slip.

I have also fitted a full TinBum kit (guides both ends of the spring).

Found wisdom from the Interweb, suggests adding about 10 - 15 grams to the piston weight to make the pistol more efficient - I will be giving that a try.

Currently, the HW45 is making 4.6 ft.lb with RWS R10 Pistol (6.99 gr.).

By contrast, the Diana/Original Model 5s are a doddle to shoot well; and more importantly, for me, shoot much more accurately than the '45.

From rest, the Model 5s groups are approximately 1/3 of the size of the '45s, at both 6 yards & 10 meters.

Have fun & a good weekend

Best regards

Russ