Bespoke gun's

Hi all I spent a good few year's back in 1996, seeing what i could do to improve the smoothness consistency and accuracy of my first HW80 carbine i bought new back then. I did various work experimenting with transfer por's lightening piston's and action etc. I sold that air rifle around 15 year's ago and bought two more and also improved them greatlyt oo the first HW was a 22 and the other's were both 177 and i also reworked the stock's and oil finished to my liking. sold these and later managed to purchase another much older HW for £15 it had a bent barrel and was rusty etc. I straigh