Wheel bolts?

This may seem a silly question but it is one i need answering.
 We are getting there with this  Marlin trials  build took a lot longer than anticipated i can tell you,several u turns  in power plant choice did not help mind.
  i will post pictures when it is completed i am at the stage of sorting out wheels, i will be using MGB rostyles they are plentiful and i have lots anyway. NOW????

 Wheel bolts or locking lugs rim locks Tyre clamps. not sure what others call them, but basically they hold  lyres run on low pressure on to the beed to stop instant deflation.
  My questions !

1 .. Obviously they are legal to use !!  --   Are  they ?
 2.. How many to fit.
 3  Advice on construction  and fitting
 4 I Would rather make my own  if at all possible but can you buy them and where from.

One last question as an after thought, i am ready  to drill the 575 van drum brake hubs to take the disks, i fitted  a old BMC ex riley 1100 remote brake servo with the std front disks, it works fine. But not sure how many are out there now. This got me thinking with the twin leading shoe  drums being kind of self sevoing and taking into account i wont use this car on the road much. should i fit the drums rether than convert to disks.?
 Instinct tells me the disks will clear better in mud etc, but what are others thoughts based on experience of drums on marlins or other cars in trials situations. ?

The Kyrle Trial

How was your Torbay Trial

John Salter was there and took some great pictures

Click Here for more of Johns Pictures

How was your Torbay Trial?

Marlin 3 core radiator with moved filler cap.

As requested heres a couple of pictures of my 3 core radiator.

Message to drjonrose

Thanks for your application to join ClassicalGas. Your application does not comply with our rules on real names. Check out "Joining Classical Gas" on our main page. - Michael

Northern Classic 2012

Hope this works!!!

My attempt (and success1) on Sandale

http://www.youtube.com/watch?v=zcAKPTBOuaY&feature=channel

Myke, John Blakeley and Baldrick.