FX-1 What is the diameter of the fx-1 intake cavity?

I'm currently getting ready to grind out a fx-1 pump shoe, and looking at it, it looks as if the cavity is around 135-140mm? Anybody know exactly??? I'd check but my FX-1 is outside in a pile of snow.

As for grinding it out, it looks like I will want to grind it so that the diameter increases from ~135mm on the ski side to 144mm on the pump side of the shoe.
 

DangerBoy

Runs with scissors
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The FX-1 Pump shoe Cavity is 138mm
needs to be enlarged to 150 mm to fit the OEM plastic superjet pump shoe or 148 mm to fit the Blowsion aluminum one.

Db
 
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