Brauchbarer Servomix?: Graupner-, MKS- und KST-Servos

New sailplane, 5 meters. Producer of kit proposes "old style" servos but I would like to use HV (7,4 V.)
I've found a mix based on dimensions, weight and costs and at the end I've to use togheter Graupner, MKS and Kst servos.

What do you think about this mix ?

Thanks for your opinions and advices.

My question was coming up when I read this advice from Jeti ( I've a DS16)

http://www.jetimodel.com/en/DC-16-amp-DS-16-1/How-to-set-the-smoothest-possible-operation-of-servos/

MKS and KST have a working frequency of 1520 us/333Hz but Graupner HVS933 there is this indication
Neutralimpuls 1,5ms Ansteuerfrequenz max 3,0/333Hz

I don't like to have servo noise in neutral position and/or non perfect running in the neutral position.

Can you - please - give me your opinion ?

Just for understanding:
KST & MKS have an neutral pulsewidth of 1520 us, Graupner has 1500 us, max pulsewidth for Graupner is 3000 us, frequency for all is 333Hz.

Neutral of servo may be adjusted from the transmitter, also min and max values, per channel.

So a mix should be no problem, unfortunately I can't say anything on neutral noise of these servos. I'm flying Graupner/sj servos on different types, should get my first KST servos this week.

Ok thanks,
at the end I've worked out to new HV solution for my Discus.

Any opinion is welcome !