Re: H H 3 way 1 v 2 t
Do you still have a middle pickup, or are you going full H-H configuration? What was the issue with the wiring the shop guys did?
Here's one for HH with a 3-way Tele switch and 4-conductor SD humbuckers. If you have 2-conductor, then black is ground and whatever other color you have besides bare wire goes to the pickup selector (bare wire always goes to ground; those wires and a lot of other ground connections have been omitted):
The three-way is wired more like a Tele than a Strat, but each hot pickup lead has the tone control in parallel, which allows the tone controls to respond to the pickup selector switch, unlike a Tele where the tone is wired off the volume pot after the pickup selector. In the middle position (neck and bridge together), both tone controls will be active and there's not much you can do to fix that, which is why Teles don't have two tone controls. On an LP, the two tone controls are each hooked to an independent volume control allowing you to "decouple" the tone controls by turning one pickup down.
If you have a middle pickup, I would recommend wiring it using a "middle on" switch. Just replace one of the pots in the diagram with a DPDT push-pull pot, then wire the middle pickup's hot lead to the center terminal on one side of the switch, and another wire from the terminal on the same side of the switch that's closest to the pot, and connect the other end to the center wiper of the volume pot. Pull the switch up, and the middle pickup is turned on in combination with whatever else you have going on. You won't get a middle-only setup out of the available hardware; you'll want the full 5-position Strat switch for that, and if that's your situation then the wiring job should pretty much look like a stock Strat, except with 500K pots and a "neck on" switch to give you the neck and bridge pickups (the wiring's identical to the middle on switch, except your starting point is the terminal on the pickup selector that the neck pickup lead is wired to; you'll run a second wire to the DPDT).