Thank you for your help and support.
Regrettably, I am not in Malta now. Moreover, as I mentioned in the abstract, there are grave problems with the data I am working on. We are investigating the matter right now, and everything is on the move. What I can say on Tuesday may be already wrong on Friday; I feel it is much more exigent to obtain a reasonably stable and presentable version of my work than to train my presentation skills on a poster which will have to be seriously revised later on.
I hope to send you a draft version of my poster by Thursday. As for the presentation, it would be very good to benefit from the preliminary feedback, of course, but I am afraid I will have to do with my own experience: it is a case when the "the sooner, the better" policy is bound to deteriorate the results. Besides, I had an advantage of receiving feedback on my presentation in April, and I will make sure to exploit that experience when shaping the updated version.