G-EJBI has flown around 40 hours so far this year but with the last check being in December, it was time for a 50 hour check. Andrew and I for the first time felt confident enough to perform the work ourselves without supervision from an aircraft engineer. One job was to re-route the oil breather pipe, it had been interfering with the cowl flaps preventing them from fully closing. I still stick with W80 oi, maybe one day I will change to multigrade.