Diana Bandit Barrel Bands, which ones and where to mount it.

So yesterday while my Diana Bandit pistol was being delivered I had a very long car ride and hours and hours to sit and watch videos.

I came across some Diana Bandit barrel band info on YouTube.

One gentleman used it right outside the receiver and was using it to help mount his optic, another was using it on the end of the barrel, a third had 2 of them on his with one right next to the receiver and the other at the end of the barrel. Is there a place on these that is generally considered the best place to mount them or do you adjust them until your groups tighten up?

I searched here on the forum for Diana barrel band threads and didn't come up with anything. 

Also when searching the net for Diana Barrel Bands I get pointed to EBAY where they all look like they are 3d printed and the ones in the videos I saw seemed to be aluminum? Are the 3d printed ones worth looking into? Any advantage since the price doesn't seem to really be cheaper then the ones sold at large airgun online retailers?

When I went to one of the big airgun websites I see they have them for a Diana Stormrider and a Diana Chaser and in the reviews someone said they work for the bandit also, is one of these better then the other since they look so different from each other? I cant tell from the pics if they are injected molded plastic or aluminum and the website doesnt say. And is it confirmed they work with the bandit or is this something you have to "modify" to work with the bandit?
 
agian, the chaser one is the one you want if you want the best one .. the stormrider is the same thing except it has a big lug at the bottom to attach the stormrider stock ... as far as location yor limited on the bandit, id say its more critical how tight ... and also you got 3 barrel mounting screws .. depending on 'how' you tighten them it can change the barrel angle, revelation i got recently .. you csn actually 'adjust' the barrel to dead center of the band so it floats if the band is loose .. id play with that concept ..