Thats the reason why, Cap VC needs extras to get it nice.
Try this recipe for a VC as good as GVC
Cap VC 25%
Perfumers Apprentice French Vanilla Delux 6%
Swwetener 1%
Vanillin 1% (its nice without this, but its deffo worth adding it)
All available from Chefs Vapour, use code AAEC for 10% off
if i mix this a 12mg 33/67 (max ratio i can get) then for 10ml my recipe is
Nic base is 72mg VG base.
Nic 1.67ml
PG 0
VG 5.03
VC 2.5ml
FVD 0.6ml
Sweetener 3drops
Vanillin 3 drops
If using PG based nic base
max ratio is 50/50
Even using 10% flavouring and PG base, max pg/vg ratio is 27/73
Download ejuicemeup and read a how to use it guide. its really easy once you get the hang of it
http://ejuice.breaktru.com/