I still do all of the customer/technical support. To be honest, it is a bit overwhelming and starting to take away from other tasks so I likely won't do 100% of it for much longer. However, it has really helped us hone in on our customer needs & sell them on new features. I don't regret it one bit!
p.s. we are searching for a CTO to help us build out a team (large equity stake + modest salary). Email me hank (at) ordermetrics (dot) io if interested.