Ah yes, I forgot that requirement...
So lets say you do your training on EFIS, complete on around 230hrs...then your flying SEPs on VFR instruction for 1 year till you get that magic 700hrs, pass IR renewal then start IFR taxi work on an traditionally kitted instrument aircraft!
You will be even more out of tune on EFIS / IR flying and probably slightly worse on the ole clock n dials....this is a worry I have over IR training on EFIS and hoping to see someones elses views? or hear about a past experience from anyone who's done this route!