Just out of interest, it isn't a Hei Hei, it's a King Kahuna. The Hei Hei didn't have the gussets on the top and down tubes.
1997 King Kahunas had the same Hei Hei decals on the top tube as the Hei Hei, but it also said King Kahuna in lower case script on the seat stays, and those seat stay decals have presumably come off on your example.
The King Kahuna frames sold for £300 more than the Hei Hei, but nevertheless attracted the great majority of sales, as they were perceived to be 'better'. That may be a matter of taste, but they are slightly stiffer and heavier than the Hei Hei, so certainly better for racing.
I'm sorry, I've just noticed that you already said that!
Yes, I actually removed the seat stay decals, as felt they looked "overkill" like an afterthought of just putting decals on for the sake of it.
The 6/4 rear triangle is quite a bit stiffer than a regular 3.25 HeiHei, but it typically still takes the sting out of the trail, as only good Ti can.
Thanks for all the kind comments guys and it's still a case of "work in progress"
Have some newer/lighter/nicer tyres on the way, have the same WTB Pure Race Carbon saddle in "all Black" so room for a bit of tinkering still
Live the dream-Ride on!