Thanks for sharing @zeeeroid 
Hi @alexdavid , how are you doing?
As far as I know, the best diluent is MCT, a natural coconut oil extract.
I’ve tried it with glycerine and my impression is of a lot of “vapour/smoke”… and the flavour is also characteristic of the thinner. I’ve also tried PG and other options, but the main problem is that if the pen/vaper reaches over 180/220 (I’m not sure of the temperature limit), it could be carcinogenic… so I don’t recommend it.
With MCT, I’ve always had good results. There’s no change in taste/flavour…
@BeTheLight I had a look at this site… it makes you want to hahaha for me 
it’s inaccessible, but there seem to be good products there.