#2 The lowest cutting level is still to high is there a spacer that can be fitted behind the blade or can the wheels be adjusted to lower the deck?
I believe you have a saying in the UK that reads "If you can't see the roots, it's not short enough!", don't you? :-) Unfortunately there are no spacers that can be fitted without introducing a serious safety issue. The deck and blade are designed to be as low as possible whilst being compliant with regulation and therefore being safe to operate. We strongly advise against altering that configuration! The other option to lower the deck even more would probably result in scraping the deck over your lawn. Do you require a lower setting than the lowest cutting height of 28 mm? Could it perhaps be you have a thick layer of thatch in your lawn on which the mower "floats"? What would you consider to be the ideal lowest cutting height?