I’ll start with a few old mods from a while back…
Custom frame bash guard for my old BigHit. Made it around 2004. Why? Because I like to smash stuff! Edit: Forgot to mention. Thats an custom hybrid air/coil JrT in the photo too.
Custom painted (graphics are painted too, not decals) left hand drive off road fixed gear bike. Why? well why not? Cog was mounted to the disc rotor bolt holes. It was umm… interesting (AKA scary) to ride in the woods. It did climb like a goat thou! 2008 or so.
My Old Astrix with hand made drop outs that were about 1" - 1.5" longer then stock. Why? Stability! The bike ripped DH in the shown set up. A bit of a backwards approach with a long rear, short front, when compared to todays short rears and long fronts. But damn did it work good! This was done in 2007.