Problem with all new alu/steel dishes is that they don't make the support at the back of the dish so good.
Look at Gibertini, in their case they would have designed their dish better by making a support ring at the back of the dish, that would take the wind pressure and prevent it from warping.
If you look at my Fibo they support the whole back of the dish which makes it strong, and with the Andrew dish there are ribs all over the back of the dish so it's even stronger than anything else.
Prodelin doesn't have that advanced back structure as Andrew got, they use less ribs, probably to cut manufacturing costs.
I have the Fibostöp 120cm also and i don't think the design of it is very good at all, first of all the backsupport ring is to small to make it solid, also they did go with some feedstruts for holding the heavy subreflector arm.
The 90cm is much better constructed and very solid.
Worst dishes i have seen are the Polish dishes, Mabo.
Just some bolt holes thru the steel to stabilize it, it will warp by blowing on it
Doesn't matter that Andrew uses mesh under the gelcoat, it's neglible.
If you are under 2.54cm in hole size you can't see any performance difference from a solid dish.
I had the Winegard 3.1m mesh dish which was constructed for Ku-band and the holes was about 2.54cm, i could not tell the difference in performance from the Winegard and the solid aluminium dish.
But after 1 year or so the difference was obvious as the mesh dish lost it's shape and the surface took some beat from the strong winds as it was installed at the coast with wind blowing right in.
Most other fibreglass dishes used zinc/alu coat for the reflective surface, it was sprayed on to the surface, on top of that a thin 1mm gelcoat layer was sprayed.
That was the old/new school of making dishes, the Channel Master/Andrew is the old school when mesh was common in most dishes so they stuck with it.
I don't know any dish manufacturers these days that makes the fibreglass dishes the new school, there aren't many companies these days making dishes anymore as the whole market died 15 years ago.
We had two large manufacturers in Sweden making fibreglass dishes that was shipped all over the world to commercial installs, they were the best dishes ever made of fibreglass, it was sprayed zinc/alu.
Teleste in Finland also made 3 and 5 meter fibreglass dishes with the new method but those dishes are gone for long now, you can see some of the dishes in commercial installs.
Most dishes sold to consumers today are crap, real crap.
One example is the Wavefrontier dish where the whole dish warp when you tighten the bolts, you can see it in every install that the bolts put pressure on the reflector, just look at the two middle bolts.