You will note on the schematic that the C-numbers of the 510 pf caps (147 and 148) are out of sequence with the other components around them. The original receiver did not have them. Those were added in later versions. Clipping them out just brings the receiver back to its original design. Due to Collins' physical layout (deep chassis and layers on top of layers of wired components) I found it way too difficult and time consuming to remove the 0.01uf caps without damaging adjacent wiring and components with the hot soldering iron, so I simply bridged the new 0.1uf caps across the originals and left them in the circuit. If the originals are not shorted or leaky, their capacitance is so low (circa 10%) that it will have negligible effect on the new ones. Leave the old caps intact and use the wire leads on the old ones as terminals to solder the new ones to.