Carillons

The music is commendably clear on the page, but players might not realise, until they see the full score, that there are complex synchronisation issues across the parts. That, and changes of speed, suggest to me that a conductor is needed in order to show where the beats are - in a conductor-less ensemble there are places where two separate lines would not find it obvious which notes must marry up with one's fellow player and which are 'in the gaps'.
In terms of complexity, it's exactly this - the rhythm - which is much harder than the furtive fitnessing of fingers on frets. I'd put the note-making at Grade 6 and the rhythm a little above Grade 8.
There is a version on YouTube that not only lets you experience the fantastic range of tone colours and effects, but also lets you hear when synchronisation slides on a slippery slope.
The opening, almost exclusively in harmonics, contains more melody than many will think can possibly be obtained from the palette of natural overtones. And Carillon it is. Very effective.
The music develops before an acrid chord takes us into a much more busy section, but there's a characteristic, confident motif that starts to get asserted. In the fiddliest sections, one guitar from each section takes the fast notes but every-one returns within a fraction of a beat to strengthen the sound but keep the detail in the awkward bits. Fiery sections assert themselves and then vaporise to leave the motif exposed. The ending of the piece is a gentle business that fades into nothing, though personally I'd have loved a reprise of the harmonics at the start.
Difficult to get tidy, this one!
Derek Hasted