Re-trimmed D diagonal on R. Trimmed L 3mm under and hot-glued on a strip of 3mm ply. Remarked diagonal shelf lines - measurements all good, tips BOTH at 7.46". Cleaned up bottom of D and is sitting nicely.
Placed D back in it's nails and brackets and bondo'd into position.
Bondo'd A & E in position. Result is square and accurate. Will leave to cure before fitting remainder.
Cut out remainder of "one inch" sticks, using old 19x35mm jigs.