As for the french BB tap. They are expensive but not difficult to find (buy) a 35mm x 1 tap to chase threads in a French BB because it is all right hand thread. I have remember one of the San Francisco California USA members put me on to a chasing tool that is adjustable and would seem to be suitable for this job is chasing is all that is needed.
I am the one being "cheeky" here with some assumptions. Back to The Raleigh Limited edition enigma; Please correct me if I am wrong but I have only seen the "Pros" of this era with 172.5 crank arms. Incidentally they also have 6-speed freewheels I have never seen a Professional with a triple. the short wheelbase would make it an undesirable choice for touring IMHO.
Sheldon notwithstanding, a longer lever (crank here) arm would give greater leverage assistance out of a turn for a sprint. The #56 that I have is short and with a higher than expected bottom bracket. Other Pro' owners please check yours. Perhaps the Limited Edition is a Criterium bike. With a higher BB you can get away with a slightly longer crank arm.
As long as I am prognosticating I may as well let it go that at the Sacramento Ca. swap meet I sold little, it just didn't seem to be our crowd. I did add to my needs with a flat lever Campy brake caliper w/o bolt. The bolt on it was a Dia-Compe drop bolt. I have some extra Campy bolts and gave the drop bolt back to save my self some money. I never thought I would say this but; I have enough drop bolts.
I did see a likely French frame due to the Simplex dropouts,with a hodgepodge of parts. It had an artist signed paint job that was hideous. the brakes were Dura-Ace with Campy drop bolts front and rear, SunTour bar-cons, a low end SR alloy crank with swaged primary chainring, etc., etc.. I never saw the owner but I would like to acquire it if the price is right to strip and redo, if only to liberate it from its ignominious condition. Oddly or not it was in my preferred size frame.
There is the flaw in my assumptions that may lead one to believe I am full of it. Whatever it is may yet to be determined.
happy trails john strizek; sacramento, california in the USA