472kHz WSPR during the night

PA3ABK/2 (306km) and F1AFJ (607km) copied on 472kHz WSPR overnight and my 5mW ERP was copied by PA3ABK (306km) and local G4KPX (14km). I will give my preamp for the band an outing later this week. At the moment I am still using the (rather deaf) FT817 on RX. I think another 4dB at least is to be had on RX.