Triumph - 'O', Ring, Square, Section - 3600060T0301

I have a 2001 Triumph Legend. Converting it from tube type to tubeless wheels using parts from a 1998 Triumph Trophy 900.
Advantages of better tire selection and dual disc brakes up front should make a big difference in handling and performance.
Also using forks from a 1996 1200 Trophy.
Rear wheel appears to be a pretty straight forward swap, but requires a brake swap to the older over the axle type because the Legend stock rear rotor is larger diameter than the Trophy.
I'm just getting started with the project. Gathered parts from several sources, but I really appreciate being able to get the critical Triumph OEM parts from 2wheelpros.

Parts used in this repair

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Total price:  $60.38

Triumph SCREW, PAN/HD, TX, M6X1.0X12, ENC (T3331042) $1.29

Triumph LOCKNUT, FLANGED, M8 (T3350004) $2.12

This item: Triumph 'O', RING, SQUARE, SECTION (3600060T0301) $8.65

Triumph SLEEVE, M10, STEPPED (3000045T0301) $1.96

Triumph STRUT, REAR, BRAKE (2020820T0301) $32.83

Triumph SLEEVE, M8 (3000050T0301) $1.19

Triumph P-CLIP 14.3ID (T3700020) $10.40

Triumph BOLT, RHHF, M8X1.25X30, SLV, ENC (T3200090) $1.94