In the part of the UK where I live, a common set of conventions played at clubs and EBU tournaments is Acol based with 5 card majors, weak NT, weak jump overcalls/truscott (and often also Benji/reverse Benji: 2C 23+/9t, 2D 20-22/8t, 2H/S weak).
(Stayman, UNT/Michaels, and transfers are usual as well, but less relevant and more "stand alone", so I'm ignoring them here, and looking at the core of the bidding system.)
I'd like to be more clear how these work together and especially how to bid and interpret the "edge cases", but most books on 5 card major bidding seem to be based on other bidding systems so there's not really any clear guidance I can learn from.
Which would be the closest widely used 5 card major system to this, and what would the main adaptations be from it?