Ask HN: 4 YC Founder Team?

My cofounders and I have been considering applying to YC. We've been working on the project for 2 years, paying the bills by performing industry specific services, and plan to have a sellable prototype by December (we're a hardware startup, which is why we've taken so long).

But, we have 4 founders in our current state. I understand that YC prefers 2 or 3 founders, but we've been bootstrapping for 2 years with 4, so does that balance out the higher risk of the 4 founder? Thanks in advance for your thoughts.

Also, just to clarify, our team consists of a hardcore embedded linux/os dev, a back end dev, a front end dev/designer, and a sales/marketing guy (who's learned enough coding to write simple CRUD apps). Disclaimer: I'm the marketing guy.