LX88 - I have made a very easy (and extremely boring) test of the C/V (C3) straight from HX3 version 4.25 to Cubase 9 with no effects and with the Leslie disabeled.
The C/V is highly adjustable, and this is the standard settings.
There are 5 takes pr chord from the mid of the keyboard to top C of the keyboard :
1. 888000000, no C/V
2. 888000000, with C/V
3. 888000000, with C/V and 3. perc. soft, fast,
4. 888888888, no C/V
5. 888888888, with C/V