I like my sump guard and spent too much time making it to admit it was a waste of time

. As for the mud flap; I doubt it weighs 10 g.
I’ve been tweaking the Beta Alp. After the Edinburgh Trial, I decided the seat height was still too high. Too be honest, I would probably only be happy with a seat height approaching that of a road bike

. Anyway, I investigated what I could do.
The front suspension was easy; I just raised the stanchions 15 mm in the yokes. Job done

. I couldn’t go any more because the stanchions start to abut the handlebars.
The rear suspension looked more interesting. Two plates link the swinging arm, rear shock and the frame. So by altering the position of the holes in these link plates, I can move the swinging arm closer to the seat. Removing the manufacturer’s link plates to free the swinging arm, I worked out there was only a certain amount I could move the holes before the rear wheel fouled the bottom of the mudguard

.
The result is two new 6 mm thick link plates that move the rear wheel spindle 40 mm closer to the seat

. And it'll still stay upright on the side stand; shows how much it was leaning over before the mod.

Fig 1 Beta plate on the left; new plate on the right

Fig 2 New plate installed