Trying to encourage you to have a go at least with the 5. Did one this morning, seal rotted as usual. Took pics of trigger group which fits together very easily.

Regards, Baz

https://i.imgur.com/mOhmg5B.jpg
https://i.imgur.com/3jWBM0N.jpg
https://i.imgur.com/OiBoIED.jpg
https://i.imgur.com/LJaE31e.jpg
https://i.imgur.com/G1GXdIO.jpg