Tremolo Design Question

[makinrose]

For some time I've been using this LDR circuit for signal varying tremolo: http://sluckeyamps.com/trem/trem.htm. I've found it to be less noisy than the Fender version.  I've also used the Wide Range Trem that works well too.  I'm wanting to try a tremolo that wiggles the bias on a pre-amp tube by pulling in and out the cathode bypass cab like the Garnet example in TUT-2.  Could the LDR circuit I'm using be used to do that by hooking the negative end of the cap to it?  Before a start a prototype are there any design considerations I'll be needing to make?  Thanks Guys!