I've been reading up for 2+ hours on all I could find about pumps... I have a Lesco Space Saver. It has the Hypro D403 on it. I loathe it. It requires such frequent maintenance, it's a nightmare. I am considering swapping it out for a Hypro D30. Folks seem to go longer between rebuilds with them, and they apparently last for years and years. Will the D30 fit directly onto my existing gear box and motor? Is this investment REALLY going to save me some headache? ANY FEEDBACK OR OPINIONS WOULD BE APPRECIATED.