Greetings, I've been looking at mowers for the last few years and have settled on a Lawn Boy Silver Pro push model based on its low weight, power, and reasonable price. In the opinion of the pros is the duraforce 2 stroke engine of good quality? Is the staggered wheel a cause for scalping? Can I run Amsoil 100:1 premix with good results? Are there any mods that you perform on Lawn Boys out of the box? Thanks in advance.