Just had one put one in
They are brilliant, and with 1300Nm of clamp pressure.
If yours came with NPC's slave cylinder, you will not need to use both feet to push the pedal in either, but I have been told that is standard with all kits.
Just picked the truck up after having a 45L under car water tank installed, a 90L sub fuel tank to go with the 170L rear tank 400KG constant rear springs and polyair dominator 4 ply airbag kit with the new airbag dislocation kit so zero impact on wheel travel or risk of damaging the bags flexing the suspension. Also had the NPC clutch fitted.
From a quick Google, it looks like Workmate, GX, and GXL isn't a worldwide thing, and only seems to be in Australia, Africa, and Asia. So I'm guessing they have different labels for the variations in Russia.
In Australia, the GXL it the top spec variant. Followed by the GX, with the Workmate being the most basic package.
I put 265-75-16's on new 8" rims, to give the tyres a straighter sidewall, when i let the tyres down to 15psi, which I often do, in the Victorian High Country tracks,.
Works for me, as I recon why start a sidewall bulge, when you don't have to.