Stanchion tube is on the way.
Currently I am trying to fit my clarke tank onto my bike. I bought the 3.9 gallon tank designed for the S/SM model and am fitting it to the E model bike. The E-model clarke tank is a pathetic 3.2 gallon (13 or 14 litres). In retrospect, the acerbis tank would've been the best choice. 16 litres and no effort required.
I've got the tank on, but the clearance between the top of the engine/tapper cover is 0mm. So I am trying to raise it a bit. This is a small bike, and the tank is a hefty thing.
Here's how the stock tank looks on:

Compared to this:

So the problem is down here, on the right hand corner:

And here, no space to turn the choke on:

My solution, a foam thing:


Attached like this:

Tank clearance is better, but still not great:

Got about 10mm clearance but the tank is empty:

I can turn the choke on though:

How do I fix this?
More foam?