Here I will explain how SI works.
What is an SIer?
Someone who uses the masterly dwarf to combine your gear (weapons/accessories/sets) at the cost of macca.
How much macca does one SI cost?
For AC items each SI costs 80k (Shirt + shirt = 80k; Pants+Pants+Pants=80k; etc)
Non-AC varies, could be under 1k to 280k, possibly more but I've not came across higher then that yet.
How does SI work?
Well, it has 3 different 'slots'.
Slot 1 = Durability, looks and set bonus.
Slot 2 = Basic Features [including weapons affinity]
Slot 3 = Characteristics.
Note: Imma add pictures later.