kryolla - thanks, i have used the rackers site before as i have been trying to stretch my MLT by thickening the mash, but have started reaching my limits in the 60's. really just want the ability to do an IIPA maybe once a year, so supplementing with DME sounds like the best route.
HairyDogBrewing - thanks as well, i figured it would take longer, sounds like it is actually possible
and Bobby_M - thats kind of what i was expecting, although now that i think about it, it seems it may be possible to simply try the "english sparge" method and i will end up brewing 2x 5 gallon batches, one heavy, one light. Am i overlooking something fundamental in that regards (other than i am going to spend a whole day in the garage!)?