I am betting it is one big guessing game when trying to make a rod out of 3 from a blank built for 4. Not how it was designed and changes the whole game to something new.
I am betting it will be very fast, that is where glass has it over graphite in my opinion (talking rods under 6'). I agree Biddadyrods. Tape them down in a general measurement, then stress test. Should do that to all rods like you say. General area. And I noticed Midwest gave you measurements for one more guide. I would go that way for sure.