I'm running Sport and have noticed both the problems you mentioned Alan: variations in slot width and uneven joints. The thing is that once you have your final layout you can sort out problem sections and get it all running smoothly before wiring and sticking it all down permanently.
Grip? ...well you know me
As for "routed", I made two hand made tracks back in the '70s: a small hardboard track with a hand sawn and sanded slot and later, a 12' x 4' routed chipboard track with a hand cut hardboard raised section. Neither was particularly hard to make.
The latter track was in the attic and the only negative was the copper tape conductors which were none too happy with the extremes of temperature up there. I imagine you might have a similar problem in your garden shed so braid conductors might be a better bet if you go that way.
I'd make a routed track again if I had the time (and hadn't already spent so much on Sport track). Then I could run wing cars
Grip? ...well you know me

As for "routed", I made two hand made tracks back in the '70s: a small hardboard track with a hand sawn and sanded slot and later, a 12' x 4' routed chipboard track with a hand cut hardboard raised section. Neither was particularly hard to make.
The latter track was in the attic and the only negative was the copper tape conductors which were none too happy with the extremes of temperature up there. I imagine you might have a similar problem in your garden shed so braid conductors might be a better bet if you go that way.
I'd make a routed track again if I had the time (and hadn't already spent so much on Sport track). Then I could run wing cars
