Second meeting of Drone Racing Belgium. Same location, different track! Dquad iniMiniH 4″ (https://www.multirotorparts.com/frames/dquad/dquad-inimini-h-quad-4-versie.html) …
https://www.amazon.co.uk/FPV-Flight-Dynamics-Mastering-High-Performance/dp/173620940X/ref=mp_s_a_1_1?dchild=1&keywords=fpv+flight+dynamics&qid=1611684640&sprefix=fpv+flight+d&sr=8-1 found it cheaper for you UK pilots…