I have four Tubescreamers, one modded by a friend and three modded by John....one that he did is a just acquired TS-9 that arrived a few days ago, and the other two are TS-5's I bought for real cheap on ebay and had shipped to John and then sent to me, modded. Let me start out by saying although the TS-5 has a slightly brighter sound than my TS-9, I'd put anyone of them up against any stock TS-9 anytime...they're cool little pedals and if you're on a budget they're a great way to get really good TS'r sound. Except for a few components the circuit boards are basically the same in the two pedals.
When I activate my John-modded TS-9, however, and hit the #1 position on my Antiquity-loaded American Strat as the signal flows through my Fender Deluxe Reverb cranked to the sweetspot of about "4" or so, it's as 'bout as close to some sheer Strat heaven like I've never experienced before. It's Stevie Ray, it's Jimi, it's Trower, it's every great classic rock sound I've ever heard a musician play out of a Strat. This pedal kicks and sounds excellent in any position on a 5-way switch!
And as for using it with a Les Paul, it's rock n' roll all over the place. The sustain is incredible and the tone is vintage. The JB and Jazz I have in that guitar really scream with this TS-9. He really did a great job of dialing that tone in. I love it along with the DS-1 and SD-1 Boss pedals John modded for me as well.
I'm not just saying any of this because John's a friend, I'm posting this because IMO John has some really great talents in the circuitries of this and a few other pedals like it. Very clean work, he's anal about that....lol....and very professional looking. I know he could be doing this as a business if he wanted to and compete with the best (I won't mention who but I know for a fact there are some big-name guitarists out there who are hip to John's modded TS-9's), but he'll be the first one to tell you that he loves doing this stuff just because he likes to see people become happier with their sound in a way that is very reasonable. A pretty cool thing to be doing, IMO.
Try one of his modded TS-9's if you're really set on having that classic 808 sound, and you'll hear what I'm talkin' about. It's too sweet! Nobody better ever steal mine or I'll track 'em down and do bad, bad things....lol
....Bob