its good to "meet" someone who has the Fast Deer. Like you say they may well be worth experimenting with, I havent seen an actual one in over 30 years! Maybe a softer spring would calm it down?
I do like cheaper guns as its no disaster if a mistake is made and if the gun is a little quirky then for me they are even better. The Chinese Airgun Forum is great but its really quiet on there now. I dont think they even have a B10 listed.