That's how I do it, they're put on by eye then all but the rear/driven axle are adjusted a pair at a time till the run freely. What makes these a little difficult is that the rods are in one piece so they need to be put on all 4 crank pins at once, it was then a case of adjusting until they dropped on easily then final tweaking to get them smooth.
They're Gibson wheels, readily available, cheap (relative to Markits and Ultrascale), the correct type for the loco and (despite what some people say) very good. As it happens the tender wheels are Sharman, picked up on a second hand stall for £1.50 an axle.
Never had a problem just pushing them on and tweaking them. you've seen my locos running and I'm happy with them
Progress...
The basic tender and footplate are built and I've had a look at fitting the cylinders, mainly at what clearances there are between the crosshead and the leading crankpin, it's going to be tight but it shoult be workable, the kit was designed for 00.