ended up doing following two test batches & both smooth af
1) testD 400 1.5/25 (MCT)
2) testD 200/testC 200 1.5/30 (MCT/Castor blend - 60/40)
the one with castor is a touch thicker but still perfectly fine to pin with a slin pin.
Going to jab 2ml of each into my delts with a 25g before I go kickboxing today will report back.