dave weil said:

That's a good point (pardon the pun). There are dedicated 78
cartridges with the proper profile. A good compromise is getting a
detachable headstock tonearm and having a spare headstock with such a
cartridge installed for quick changeout. Unfortunately, this isn't
possible with the ProJect turntables.

You'll probably need a heavier arm with a dedicated 78 cartridge.
At higher speeds, the forces on the needle, cantilever and housing are
stronger.
A heavier arm will prevent groove jumping and provide better tracking.

Or, one can just get an older 78 compliant turntable as a second unit.
You can probably pick one up for a song on eBay nowadays.

That seems to be a good idea.
Preferably, if ever such a beast can be found in the USA, get an old
Thorens TD124 with the stock arm. Heavy construction, heavy arm.
Perfect for playing 78-ers.

--
Sander deWaal
"SOA of a KT88? Sufficient."