i am unlike all here, in that i love Thermo-Quads !
however, it took me YEARS to figure them out, and be able to tune them to my needs.
the result is good/reasonable gas mileage with the added oomph of the monster secondaries tunable with the air door.
before my retirement, jets and metering rods were kind of hard to find, so i whipped up programs for them on a CNC we had at work, then made a bunch of each.
in the interim, i pick up T-quads cheap at swaps, or sometimes i get them for free from friends.
the only real problem i run into almost always, is the jet wells on the bottom of the float bowl come loose and leak.
the fix for that is the gasoline resistant version of JB weld.
no problems otherwise.