In reply to Denni:
Quite a few from me.
Putting a wire into an old Buffalo hood to stop it flapping over my eyes.
Tying a small loop of perlon onto zip pulls to enable use by gloved hands.
Tying small loop of shockcord to winter gloves so less worry taking them off in the wind.
Tying perlon on to side of rucksack to keep snow pickets out of the way when ice climbing.
Creating extra large windshields out of sandwich trays to shelter stoves.
Cutting a very small block of sole tread away on my B3 boot to enable rand of Yeti gaiter to fit really securely.
Cutting the lining material out of an old Rab Vapourise hood so it actually folded away.
Taking out the overtight elastic in a Rab Gilet to stop it bunching up if I raised my arms.
Getting Paramo to extend my new Velez by 3" so it was a decent length. Excellently done.
Learning that I needed to stay indoors so I did not get soaking wet in above Paramo.
Serial modifier here.