OK, I know I could have just bought an FAC version, but couldn't find an affordable one. (Despite the myth that they're cheaper).
I've bought a Daystate Air Ranger sub 12fpe with the intention of using it in my spare FAC slot. It's a tidy gun, with the slingshot hammer system. From what I've seen and read the FAC versions use much heavier hammers and springs.
Has anyone any experience of actually doing this, or can advise on hammer and carrier dimensions. Alternatively, are there any gunsmiths on here who could do the job economically?
Pete