Forgeworld Dark Angels vehicle icons

I bought some of the Dark Angels icons in December while I was at Warhammer World.  I'm just getting round to using them now and I have to say they're not very good!

I'm building a Belial for the Paint Or Die to make it a legal list.  No greenstuffing or anything, just using Forgeworld icons and shoulderpads.  I intended to fill in the square on the top of the armour and put an icon there from the icon pack.  Not having any success right now.

Go and have a look at the icons on the web page.  They`re all nicely cut out for you aren't they?  Here's what they look like when you get them.

They're cast as part of these sprues.  The backing is about 1.5mm thick.  I tried to take that small icon off by filleting it with a fresh blade.  Wrecked it.  I'm now working on the large sword with a single wing that you see in the photo.  This is what it currently looks like from above and the side.

Awful! I'm gonna have to sand the heck out of this one to make it thin enough to look good. Strangely the oaths of moment (aka purity seals) fillet from the backing quite easily, as long as you're careful.  The larger icons are just shite. That is all. I sent a disgruntled email to FW about this, with pictures, asking for "better icons".  Given the current crisis with UK airspace, if they send them to me it might take a while.

UPDATE:
In a moment of clarity I put a piece of 60 grit sandpaper on my worktop and sanded the crap out of the excess resin.  Managed to get the thing to the right thickness.  Still - boourns!