Cheers HN. I'll be posting up shots of what's been painted cumulatively each month, just need to get everything out!
As for making the Belderaks, here's a tutorial -
You'll need part of an Imperial Guard dozer blade, barrel, small track guard and towing hook (all from the Imperial Guard tank accessory sprue), a spare plate and lasgun from the Imp Guard Chimera kit, and a cart from the GW dwarf miners set. A 50mm ds base is also handy.

First, take the dozer blade mount and trim off the end (keep it handy!) and cut the side prongs on the bottom and semi-circles flat. Remove mould lines.

Then remove the cart from the cart base and trim that flat too, and cut off the little connecting pin on the inside edge. Also remove the studs on the track guard (since the Delgon don't seem to use rivets much) and cut the wide plate from the back of the tow hook.

Stick them together with the cut-circles side towards the raised part of the cart platform, and attach the tow hook in one of the grooves on the dozer mount.

Trim the spare plate down to fit on the raise parts on the back - the bend in the plate fits very nicely on the curve. Also take the other half of the dozer mount you put aside and slice the end off.

Stick on the platform and then attach the slim part of the dozer mount at a rough 45% angle - there's no real flat connecting area, but I found superglue was more than adequate to hold it.

Trim off the ends of the barrel with the raised stud. I chose to trim them at one of the band lines.

Stick them together and place with the retangular prong downwards on the chassis. Again no real flat contact points - I added superglue from the underneath. In terms of positioning Have the front of the barrel just over the inner prongs on the front of the chassis.

Stick on the track guard and swivel the barrel up till it's flat - I again added superglue from the bottom on the contact points. Also, at this point you can plonk it on a base.

Ta daa, one Belderak. The lasgun can be trimmed off the ball for an instant mortar sphere if you like. For those without lots of GW components, the barrel could just as easily be plastic tubing, the plate could be plasticard bent or cut to shape, and the spheres can be made with spare modelling putty of choice.
If you wanted to have the thing loaded from the top rather than the front, any piece of relevant size tubing can be used and stuck to the track guard, but it's not really necessary.
Oh, and that Hunter is finished, with a rather bright skin tone to stand out from all the other browns -

Now I just need to do group shots....