Hoping someone who owns the new Steel Deck 20inch Self-Propelled model can chime in and tell me if the mower cuts consistently when using SP and when not using SP on different passes. I had the 21inch SP model and on my hills, it would cut higher when going uphill using SP than when coasting downhill not using SP. I really like everything else about the mower except for that so I ended up returning it. Might get the 20in Steel Deck SP if the mohawking/striping issue has been addressed. Thanks in advance of the info!