For enthusiasts! Rotary Assembly, Yamaha Made

This is a special item for enthusiasts.
Previously, I considered rebuilding the F slide of a Yamaha custom trombone (such as the 8425 or 8425 series) into a Conn-style wrap, similar to the 648 or 643. To do this, I docked a rotary valve for the 648 with the joint section of an 8425G2. However, I was unable to obtain new F slide parts for the 648, so the plan stalled and my passion cooled.
Please use it in my stead.
These are rare parts from discontinued models.
You can either convert the F slide of a custom series to a Conn wrap, or change the rotary valve of the 648 or 643 from a string system to a ball joint system. This is truly for enthusiasts.
To adapt the 648 rotary valve, which was originally a string system, to a ball joint system, I used a rotary rotor from a Xeno and reversed the damper rubber base by 180 degrees, drilling new screw holes in the rotary casing for attachment. The original screw holes were plugged by screwing in from the inside of the casing. Please check photos 4 and 5.
The lever is not included, but I believe a current Xeno lever would likely be a direct fit.
The rotary cap is from a Xeno.