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Yes they are An Alan Johnson design. The heads are now made at total flow if you want. They are the same head but I'd say the total flow are...
Guess it depends who you ask, we have had issues with our 44 a few times but never had any problems with our 20 we keep it around for a spare...
Hey there Walt, we use the bull machine on a rolling cart and usually ground spares back at the shop and still do but as the weather got a little...