Thanks a ton for the quick response, and i like the like dot idea - after i made the post i found these - which will work albeit a bit expensive
https://www.ebay.com/itm/O-SCA...5738.m4383.l4275.c10
Unfortunately i dont think that i have enough room for a board with a trace of the track, although i would love it. i guess i could put it on the side of transformer down low.
thanks for your help