Hi Sony Chums.
You may recall the focussing issues I had with my A6700 (real or imagined I could not get consistent results when using subject detection). The camera was bought through Cotswolds and when I reported the issue they put me straight through to their repair representatives (Johnstone and Co in Glasgow as I'm in Scotland) - no quibbling and good service from Cotswolds I have to say.
Johnstone's had it for a couple of weeks and have returned it today with the following carried out - 'Dismantle to reset image sensor and giro. Full AF recalibration and reporgram to standard. Check clean and reset' Goodness only knows whether this will have done anything!
I sold the 70-350 as I thought it was the issue (a mistake I now think) so I'll test it with the sigma 105 on some insects when I get the chance.
I'm also considering a move to M43 - OM1 + 100-400 maybe (to cover birds + insects as you can get a pretty decent macro with that lens) or maybe a 300mm f4 if I go mad but that would break the budget completely! Not made up my mind yet though and another option would be to stick with what I have and pick up a Tamron 50-400. (as a matter of interest are there any 400mm Sony lenses that can do a decent macro at 400mm? I know the Tamron does but only at very close range/50mm)
Thanks again for all the advice and well done if you read this far