Hankovitch wrote:
Kataphron tracks are pretty weedy. They might look okay replacing individual tires on a trukk or a speed freaks buggy, but I don't think they'd convey a nice chonky half-track feel. Your best option, assuming you don't have a 3d printer in your back pocket, is to find cheap toy tracks to salvage. The Robogear toy/model line was particularly good for kitbashing.

The Galvanic Servohauler set was also really useful for these purposes. It's on the pricy side, being a GW terrain set, but you can get a lot of orky looting out of those components.

I'm guessing you don't have or don't like the taurox tracks? Cause those in the back and some trukk tires up front are an instant half-track recipe.

Hankovitch wrote:
Yeah, Robogear has been out of print long enough that it seems to have mostly fallen out of the market. It never had much of a storefront presence in NA, mostly it was available through eBay and the like.

Skrapjet tracks are decent sized, the only issue there is that you're pulling bits off a relatively expensive kit. But if you've found a source at a price you're content with, they'll do the trick.