So, an update: I completed the wheel rebuild of this conversion after blowing a spoke on the rear Bontrager stock rim by replacing both front and rear rims with the Sun Ringle Rhyno Lyte rims built with DT Competition double butted spokes to Shimano Deore hubs.
At the time of the rebuild, because of the shifting problems with the stock rear 10 speed cassette and SLX derailleur, I went ahead and placed a new 9 speed Shimano 11-34t cassette upgrading the shifter/derailleur duet to Deore components. I also changed over the front disk brake mechanism from hydraulic to manual so that I could integrate the brake into the wiring harness. I also upgraded the chain to a KMC completing the drive train rebuild to everything 9 speed.
It must be the new bearings on the front and rear because as I was taking 'er out yesterday for a spin, well, all I can say is she really flew - seemingly faster than before. The shifting on the new Deore der was flawless - no more grinding, clinking, mis-shifts. Perfect! I was coming down Terwilliger here in PDX, which at points is a fairly steep downward incline - and in PS3 actually found myself throttling back. I usually go up to PS5 and in the past have wanted more, but this time...I just thought "wow". Huge difference.
Who know, perhaps a placebo effect, lol!
One of the things I'm concerned about for this build is the Trek 8.6 DS frame. I bought this bike while Trek was incorporating their IsoZone rear shock design, which they dropped the year after I purchased mine in 2014. It creates a bit of a wobble at high speeds and honestly, I'm not too crazy about it. Also, the lack of lateral stability in corners makes me think one of the reasons why the stock Bontrager blew the spoke - in a turn - was because of this.
I'm wondering about finding some way to convert this to a hard tail to increase the stability maybe incorporating a Thudbuster or BodyFloat. But the thought is crossing my mind to clear 'er up, and sell. The idea of doing a new conversion sounds kinda fun.
I'll post some new pics here in a bit.
David