On the last pass of SO-50 (15:27 UTC, 20-Jun) over North America, I worked XE1SEW operating portable in DL90.
Last night he was calling CQ on FO-29 from EL00. I do not believe he made any successful contacts due in part to many stations calling CQ within 3 kHz of him. There may have been other factors. Having operated many times portable, I can assure you that neighboring stations on adjacent frequencies can pose challenges. I am not laying blame but rather making an observation.
Please, consider moving away from FO-29's passband center if you intend to operate portable. As a general rule on FO-29 I try to transmit portable below 145.93 and above 145.97. As a portable station this provides some shielding from the "death zone" of higher power, fixed stations who always seem to appear and call CQ +/- 10 kHz of the transponder's center frequency. (some suffering from terminal CHS syndrome)
73, Clayton W5PFG