CL-13A MK5/CL-13B MK6

G'day

Wondering if these planes are viable or if I should ditch them once I've spaded them. I just kinda don't know how to work them half the time, boom n zoom just isn't working? I only get a small time frame to aim before I overshoot even with the airbrake on.

P.S. What gun belts should I use on them