Ortofon Rondo Red stylus weight

I recently bought the magnificent Ortofon Rondo Red.
Do you know if its stylus weight can be adjusted using the Shure SFG-2 which is made from metal ?
A friend told me that the Rondo ,being MC, will alter the weight reading due to its coil.

Same question about this gauge:
Can it be used with an MC cartridge like the rondo?

The plastic Ortofon gauge I recently bought ended being a crap that due to its bad machining has friction that shows no difference between 1.5gr and 3gr.

Please advise...
Call Ortofon, I bet they would be glad to help you.
Are you saying that it was a unique defect of my ortofon gauge ?
Are they good gauges in general ?
Anybody ?
I bet somebody here measured the stylus force of an MC cartridge...