240 odometer repair puzzle; advice?
 

After the comments on my previous thread and a bit of web searching I bought a set of cogs ... the 25 cog and larger (15?) cog from Parts Monster. Fitted the small cog this morning and after 3 goes it all seems well ... must have been some debris in the cog area. As expected this 25 cog had a tooth missing, in fact 2.
I went to fit the larger cog but after removing the original, noticed it had 3 extra locating slots next to the 3 round pegs ... these slots fitted over flat pegs on the carrier, about 0.5mm thick x 1.5-2mm high. The new, rigid cog has the 3 round holes but no slots for the flat pegs on the carrier. To fit the new large cog I would have had to cut these flat pegs off so have left the original large cog in place ... it seems quite pliable though. Is this usual?

I contacted Parts Monster and they have not come across these extra flat pegs before and questioned if I had the VDO console ... I do, 1988 240, 2 litre. A bit of a puzzle.
Any advice?
Cheers, Phil