Self-resonant 555 astable conversion?

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Original poster: "Jolyon Vater Cox by way of Terry Fritz <teslalist-at-qwest-dot-net>" <jolyon-at-vatercox.freeserve.co.uk>

Dear List,
I am enquiring whether it is possible to connect up a 555 as a regular 
astable  but with secondary of a small (ferrite bead?) current transformer 
connected between the RC timing network and pins 2 and 6 of the IC
the primary of the CT being connected into the ground wire of the TC secondary.

I have used 555 connected as a 50/50 mark-space astable to drive a small 
(not very successful) magnifier, but with fixed frequency oscillator in an 
SSTC any changes in the topload-to -ground capacitance will detune the 
system; hence I am looking into a way of converting my setup into an SR-SSTC.

Protection diodes would of course be connected between the junction of pins 
2 and 6 and the positive and negative rails to the astable, to limit any 
excursions to 0.6v above and below the rail voltages.

This way, the IC would start up as an RC oscillator, turning into a 
feedback oscillator as soon as current started to flow in the secondary.

Would it work and if so, would some form of phase-adjustment be needed to 
get the feedback current into the correct phasing to drive the oscillator