Hello Michael,

you are right. It is rather easy to connect several devices in parallel to
divide the dissipation among several devices. Works the same as an emitter
resistor in big power supplies.
If one transistor carries more current than a fellow transistor, the
resistor causes the gate-source voltage to decrease, also decreasing the
current through this FET. The only thing you've got to be careful of is
avoiding oscillation with multiple FETs. (Some short-wave linear amplifiers
use almost similar FETs!!!)

But it still is a sound idea.

Greetings

Jochen DH6FAZ
jf@detektor.de