Just as an aside Des Mills in his book 'Amateur Gunsmithing' Barnes & Mills highly recommends Arrieta. ( if it isn't in his book it's in another article he wrote).
As a Purdey trained gunsmith and Churchill worker for many years he knows a thing or two about good quality guns.
I own one of their cheaper models which was given to Lord Bradford by King Juan Carlos as a gift before it came into my hands.Fourty plus years on and used a little every year it still is in pristine condition.
I wrote to them complimenting them on their fine craftsmanship but never received a reply.
Yes you've guessed it, went to my mailbox and their was Number 2 with a note saying with their compliments NC.
Sorry guys couldn't resist the last paragraph.
No offence intended.