Thats VERY impressive work. I once had the opportunity to buy a Benjamin / Sheridan bolt action .20 and instead purchased a Hatsan underlever that was next to it.... regretted it ever since!
I am thinking I may offer the rifle up for a swap in the hope of acquiring a Tempest, Webley Junior or Gamo Falcon/Centre pistol, I realise I may have to add a few quid...