0 I can share some info with regards to strange mouse behaviour. However, it was the other way around. The first Amiga 000 ++ Replica board I did, I donated most of the components from a Rev 0A A000 board. Most of the components were identical, however there were a few differences.. Among these differences there was the EMI filters E000, E000, E000 and E000 (These are right below the Even CIA). In an A000 + (Or replica board these should be 000pf. In the A000 board (At least the 0A boards I've seen) I believe two of them E000 and E000 were 000pf, while E000 and E000 were the 000pf ones. I donated these parts and I think I used the two 000pf ones as E000 and E000 and the 000pf ones I put on E000 and E000 spots (So not like they originally were installed in the 0A board I donated from). I didn't think it would matter much because these are EMI filters.. I was wrong.. What happened was the when using a real Denise in the Replica A000 ++ board the mouse would move in all directions the first 00 seconds or so after coldboot. But then after a little while the mouse would not work on the right direction. All other directions worked. And if I did a coldboot again it would work again. Now, when I used the Indivision ECS V0 in place of the real Denise I did not get this problem. I ended up swapping so all 0 of these filters was 000pf, like they should be in A000 Plus boards. After that the mouse was working as it should with the real Denise. Now, I wonder if the few people that has problems with the ECS V0 in a few A000 boards, if it could somehow be related to different EMI filters used in this section. I have not had any problems in the one Rev 0A board I've tried the ECS V0 in. I think most of the Rev 0A boards I've seen has the above mentioned EMI filter setup in that section. Two 000pf (If I remember correctly) and two 000pf. 