I understand your concerns but a lot of members on this forum has tunes from a company that no longer does tunes, you never know when another one bites the dust.
In most cases the only time you might have a problem is if you change to a bigger turbo, larger injectors.
ECM/TCM tuning is not quite the same as parts failing because of age.
You want to make sure you have the tuning device incase you have to replace the ECM you have the tuning to load on the new one, you have that.
A few go the less costly way with tuning by having a shop load tunes but the shop keeps the device.
Then when they want to change something like the tire size, turbo, injectors the shop or guy that has the device canít be found.
Iím in that position now, I doubt Iíd ever go with a bigger turbo, larger injectors, my tires are large enough.
EFI you have to have the tuner change the tire size, Quadzilla and Iím sure your mini max you can adjust the tire size if needed with your device.
To be honest your list is about as short as it could get, one, if you can find one.
The only reason I went from Quadzilla after 5 years to EFI was the turbo brake, otherwise Iíd still be running my Quad with no support, donít really need it.
This was before it was figured out how to wire up for a turbo brake, which you already have a factory engine brake.
2007.5 GMC Sierra 3500 SRW L.B."BLACK" C.C. 4X4 LMM Z71
DIY stock airbox mod, aFe ProGuard 7, OEM drop-in
EFILive ECM ATP - Heavy Tow Tune with Turbo Brake.
EFILive TCM Duramax Tuner
DHD Cold Side High Flow Intake Pipe, DHD PCV Re-Route, AirDog 4G100
Castrol Hypuron/Vecton 15W40 synthetic blend oil
Donaldson P550832 2 qt oil filter
2007 Yukon Denail "BLACK" 6.2 gasser
DIY stock AirBox Mod, K&N, Airaid intake, EFILive TCM only tuning