Cost of installing steel shaft on R9 max graphite irons

Currently using R9 max irons with fujikura motore graphite 55gms shaft. Getting balloon ball flight and feels too light when I'm swinging. ( I'm bout 6"1 , 90+kg)

Looking at a heavier iron shaft that would not break my back in the back 9. So figured I look at dynalite gold or ns pro. 

How much would it cost to install them? 2nd or first hand prices estimates would be nice. 

Thanks for looking!!

Ns pro 950 cost about 100 ? for a used set from 4-PW.

I went to Raymond at tradehub 21 to install the shafts n grips, cost about 150-200

15-20 per shaft
used shaft with grip > 150? depending condition
change new grip 16-18
prepare to set aside 300-400 dollars bro.

cheers

i have a used ns pro 950G Regular (5-P) which I recently put out from my mizuno and change to graphite shaft pm if you keen.

Thanks for the offers. Anyone interested and wanna trade sets pls SMS me

Looking for mizunO and titleist with ns pro shaft

90908882