many txs for your informative and very prompt response
that may well be the answer,
What I am witnessing is the mastic "stretching" when the weight of the keel
assembly "hangs" unsupported, and the keels both appear to drop slightly ..
What drew my attention to it was the mastic "squeezing out" again slightly when the boat was put down on the keels again ..
so we lifted her again to check, but the movement was very very small
Thats also why I cannot locate any "bolt heads"
inside ??? lol
so look like nothing to worry about basically ?
Thanks ... I was having a quiet little panic attack here