Roughly 2 years late, but I try to bump this thread.
I have made a table for my circuit were the controllers are plugged in at the side of the table cables are drawn beneath the track and comes up just beside the power base. I have done the same with the power cables. However, the 2,5 mm mono jack is killing me! I have bought from two different stores, but it seems the dimensions are not 100 % correct so either the female is short circuited or the male is not connecting in the power base. Could you please advise me which brand to use?