[sdiy] Polyester or Polypropylene for VCO?

[Michael Ruberto]

I am putting together a parts order for my VCO and trying to decide on the 
cap for the integrator. As you can see in the schematic 
http://frankentron.freezope.org/source/REV4-2.gif there are 2 caps in series 
- 1000pF and 0.15uF. This is from the JH linear detune mod. I have already 
aquired 1000pF 1% polystyrene caps but I'm unsure what to order for the 
larger cap. On my PCB layout I have made a  0.25" lead space location for 
this cap. From the Mouser catalog it looks like my only 2 options that will 
fit is the MKP2 series Metalized Polypropylene or the Xicon Metalized 
Polyester axial round body if I mount it on end. I know the polypropylene 
are primarily used in switching power supplies but is there any reason it 
wouldn't perform well in a VCO?

Thanks in advance!

M. A. Ruberto