GL with your new car LaLa.
It will be a blast to drive (not to maintain).
If I were you I would have slapped a Quaife and ditched the single leg, You'd be faster than the ///M. Prolly easier on maintenance too. Your actual e39 looks great.
Looking for a DIY? Parts? Check this out, it might be your ticket
TMS underdrive pullies - Stewart WP - PSS9 - Beisan Vanos seals - Zimmerman cross-drilled & Akebono Euro - Deka 649 MF - 55w HID headlights - 35w HID foglights - Hualigan double din - ACS (rep) alu pedals - Euro central storage console - Breyton Magic Racing staggered wheels - M5 bumper - M5 steering wheel - Tint
Stable: e39 M54, e53 N62 & Tribby