Using the injection beam measured with LDWFS, I computed an IO_MB lens layout that improves the JAC mode-match at 62 W from 1.8 % to ~0.1 %. 
LDWFS method and measurement results: LIGO-P2600491

Move the two injection mode-matching lenses upstream:

• IO_MB_L1: 21.3 mm (0.84")
• IO_MB_L2: 48.3 mm (1.90")

(common shift −34.8 mm sets the waist position; differential +13.5 mm sets the waist size.)

Figure: beam radius w(z) along the injection path — cavity eigenmode, injected beam, and the beam after the L1/L2 correction.