Thanks @Andre really appreciate your feedback and know your level of experience with diy.I have been doing MTL for more than 4 years now and DIY for almost 2 years. From the start of the latter I have mixed at 60VG/40PG. I have never had to up the percentages on flavours, rather the other way around on the odd occasion. The devices I use are squonkers (mech and regulated), BBs and the odd tank - like the Skyline and the Siren 2.
I am also under the impression that the % should not be increased never mind the ratio of pg to vg.
Will give a 60/40 mixture a go and a 50/50 just need to figure out the % of flavoring I ended up with after I nocked the bottle over I was going for 3% tfa peppermint 2 and 3% black ice and 1% cap supper sweet. Will start with that and see how it goes then reduce to find what I ended up with eventually.