Looks like no go on a SFO-BOS-SFO. RPUs in place but outbound is nearly full in F and the return on 7/8 is completely sold out. I think I have had one RPU clear in the last 3 years (probably at least 10 RTs). Admittedly the Sunday returns back to SFO out of BOS always seem horribly crowded with both business and pleasure travelers.