40 Euros will seem a bargain when you come to sell the bike, it makes it much more attractive to a potential buyer.
I replaced one for a HP4 I had last year from Vines who were the supplying dealer, they filled it in and stamped it up before I got it, great service. Think it was around ?32 all in, including post to Scotland.
Its a no brainer to me.
JimmyMac