They make it so there must be some amount of demand for the head. It's pricey at about $650 with bearings.
It's a pretty beastly helical cutterhead with 5 rows with 60 knives so definitely priced accordingly.
In contrast, the cheaper dewalt 735 shelix cutterhead is about $480 but of less beefy quality due to the smaller cutterhead and only 4 rows of 10 knives for a total of 40 knives.
OR, just pony up the cash for one of those newfangled 12" jointer/planer combos with helical head. I would then sell the shopsmith pro planers and jointer (I actually have two in the shop right now) to make room. These machines run around the $2800-3300 mark. Take into account I am in my mid 30s so hopefully have many more decades of dust-making left to do.
Just looking for opinons out there from those more seasoned (salty/dusty) and from those with experience with the shopsmith helical cutterhead.
Cheers,
John