Nice one, Steve. Glad it worked out ok. Optimally matching SUTs to MC cartridges, sonically, is as crucial as voicing loudspeakers correctly, by using the right components inside the crossovers.
Electrical matching is easily achieved, by choosing the correct component values, but the skill is in marrying the respective sonic signatures of the various capacitors, resistors and inductors, in order to create the most musical sound - and so it is with step-up transformers and MC cartridges!
Marco.