Yes and that individual requirements is basically why a standard out the box engine wouldn’t really work in speedway, it is nothing new, when I was spannering for Adam skornicki he told me at a meeting in Sweden his team mate Jason crump lent him a bike cause adam’s had a problem, he said it was unridable because Adam likes a motor that revs hard but is unreactive and crumpy likes one that is lively and reactive also while at wolves Adam borrowed an engine off Freddie lindgren and didn't like it, riders have different preferences, different cams, different flywheels, what works for one doesn’t work for someone else, also an anomaly that occurs in all motor sport anywhere in the world is no 2 identical engines will ride the same, same batch, same castings,same parts and settings and one will always feel better than the other