Analogue-sequencer

> I´ve been out this year,

Wow, must have been quite a party ! ;-)

> I´ll install V4.. Do I need this 
> memx boards for the early P3 I own?
 
You don't need a memx board unless you want more pattern storage.

In v3, a pattern has 16 steps.
In v4, a pattern is made up of 1 to 16 bars. v4 bars are essentially the
same thing as v3 patterns.
So a v4 pattern can be up to 256 steps long.
The total number of bars available in v4 on a stock P3 is the same as the
number of (single-bar) patterns in v3 - 384.
The memx board increases the maximum number of bars available to v4 from 384
to 3,584.

Best regards,
Colin Fraser
Sequentix Music Systems Ltd
http://www.sequentix.com