On a 23-day trip around Sabah (Borneo), with Jo Dale in March-April 2014, we saw 56 mammals (including 8 primates, 15 squirrels and 10 bats).
Jo joined me on Day 5 after I had visited Crocker Range and Poring Hot Springs. Other key sites included Kinabalu NP, Kinabatangan River, Danum Valley and Tabin Wildlife Reserve. My trip report (pdf with photos) is here.