I couldn't resist and have dropped a pledge for this bad boy from Ramshackle.
What it ends up as depends on the new Ork Codex so either Trukk/ Battlewagon base or not so much a looted Leman Russ but one knocked together by a Mek after seeing a Russ in action.
https://www.kickstarter.com/projects/179741323/battle-dog-and-pug
Should be available in August so that's another project in the bank.