i found one capacitor wire had broken off in my B4 at the end of qualifing. how long had it been off a Tekin RS with 17.5 Redline? who knows, but i made the amian. soldered it on with a borrowed soldering iron and job i knew was bodgy. end of the race, off again but the B4 was chargin'. soldered it on properly this time. still ripin' up the track!! Tekin- busted they work better than other brands!!