It is probably not about the insurance with the welded diff, but still about to get to the track and back, but if you from Teesside, you have one local, that wouldn't be an issue, but If you need to drive hour or two to get somewhere it would be not really perfect.
I don't have much experience with the tracks and drifting, but let's say I drive on my road wheels and tyres to the track ( did it on Sunday) than you change it first time before you go on track and leave your tyres to go back home, than when you finish, you just have your tyres fitted, but the wheels are not balanced, again, if you drive 10 miles home, it wouldn't be issue, but driving 100+ is not the best thing I could say.
Next time I probably take only wheels without tyres (hopefully it will fit into MX5 boot) and use this on track and change the wheels going back home.
Another points I have noticed, lot of poeple I saw had issue with the bemers overheated - at least in the play area
I don't have much experience with the tracks and drifting, but let's say I drive on my road wheels and tyres to the track ( did it on Sunday) than you change it first time before you go on track and leave your tyres to go back home, than when you finish, you just have your tyres fitted, but the wheels are not balanced, again, if you drive 10 miles home, it wouldn't be issue, but driving 100+ is not the best thing I could say.
Next time I probably take only wheels without tyres (hopefully it will fit into MX5 boot) and use this on track and change the wheels going back home.
Another points I have noticed, lot of poeple I saw had issue with the bemers overheated - at least in the play area