[MrChicky]

is it like putting a +3 and 2 +1s, = +5 thing?

[Mr_V]

lol, read item's description...-_-'
u need 3 items of same grade...
like 3 Bladium arms (all +4), use the coupon and make a +5...

[xbaras]

It doesn't work like that.
three +1's = one +2
three +2's = one +3
etc.                                 BTW nothing happens to +5 parts once you get 3 of them and use a coupon. BC used to have +6 parts but they got removed.