adjustment of plastic floats in SU HS carbs

[Dirk de Boer <deboer@duke.usask.ca>]

Just received replacement floats for my SU HS carbs on the 66 MGB. Unlike
the old ones, the replacements are all plastic so there is no arm to bend.
The question is: do I set the clearance to 1/8" between the lid and the
float using washers under the needle valve or are the floats shaped so that
they don't need adjusting?

I have some new, appropriate washers from a S.U. rebuild kit I bought years
ago for the Volvo wagon 

Dirk