Splurged on the ph test kit from Bunnings this morning. The bed with mature flowering snow peas is showing a ph of 5.5 to 6. Given they are growing and fruiting well, not going to play with the soil ph of that bed. Fingers crossed for the test Kipflers in that bed.
Strangely the ph meter from Bunnings was 2/3's of the price of the kit.
Thanks again ClissAT & Robbie for the comments / tips.