Bad idea to do goblet squats on a core board?

I was trying some goblet squats with 90 lb dumbells on one of these today and they felt great. I have seem people do body weight or light weight squats with them, and I was wondering if there is any risk to doing heavier squats on them? I really like them because I have breathing issues doing regular squats. After my ~3rd rep I have to stop and breath like a motherfuck and it's really making my squats lag.