"An extra tank gives it three times the range and twice the payload". Not with the fifth fuselage tank I know of. A Makila is about 20% more efficient than the old Turmo but it's not going to take it that far.
I have always, from way back, complained about them not putting the large mainwheel undercarriage on at the same time as the rebuild. I have survived several pretty horrendous arrivals with this type of gear without any effect on the aircraft. I was told that it was to save money. That saving will be lost at the first rollover.