Question about rotars.

Ok since I bought the t2 engine a few months ago I finally got around to pulling it apart and it was worse then I first thought it was. The rear rotar is shot the rear iron may be saveable but I didn't really take much to looking at it since I was in a hurry.
Now my question is, how does everyone feel about putting s4 N/A rotars inplace of the s4 turbo rotars? I can't remember off the top of my head what the compresion ratios are on each but to the best of my knowledge the s4 N/A and s5 turbo compresions are pretty close right?

Now I know this will keep me from running massive amounts of boost but I had never planed on running much boost, just enough to get me down the road at a nice pace.
So what do you all think? Have I lost my mind, am I going in the wrong direction, or would this be a doable thing?

1st, its spelled Rotor
2nd, you'll have to use s4 counter weights
3rd, its very doable. but the s4 rotors are heavier. .5 lbs heavier and .4:1 more on the cr.

Yeah I know my spelling leaves some to be desired but the compresion was my main worry since I have both N/A and turbo counter weights.