Sometimes, very occasionally, something comes up on an auction site that you don't know whether to buy or not. Is it necessary? Is it fun? Isn't it too expensive? In this case I came across a Triger distribution set for an 850 on EBay. Long periods of doubt and it just stayed for sale. Then I sold some parts and then the decision came a lot closer. Searched whether someone had something like this for sale to be able to make a price comparison. Although they are rare, still found two and both considerably more expensive, so clicked "buy". This week it arrived and I can do something with it. Something to tinker again soon!
For the A112 owner there is also a set for sale on EBay (actually for a 127) which fits nicely in an Abarth replica.