It is difficule single handed and, from what I hear, harder than an H14. May I ask why you don't want to use the jib?
I’m working with the D-PN adjusters for multi-hulls and come up with this
UL class normally with large jib (assuming overlapping, not self tacking)
Not carrying one
1.076
X
SP class normally w/o spi
Carrying one
0.960
X
L4 less than 70% of class crew weight (0.7 x 285 = 199.5 pounds)
Or single-handing a sloop
0.970
=
1.001 or same as standard, sloop rig class, 2-up
Hobie 16 w/spinnaker setup (at $1,500 new) is a relatively inexpensive alternative to no crew