Midwest analog delay, sad bbd and replcement

[*Star Project]

Hey...

After spending weeks online searching and 
searching the web for a lost little bbd
stock up in siberia russia that has this
fantastic 4096 chip still in stock and
is just happy to get something sold, I have
found nothing.
So im waving my white flag and giving in.
But it would be a shame to abandon this
nice little delay so I though that maybe
just maybe I can get a pretty fair result
using the 1024 instead. Surely the max delay
will be decreased from 250ms to 100ms but 
it will still be a analog delay.
After checking the schematics out one mor time 
I cant find any reason wy it should'nt work
stuffing a 1024 instead of 4096 in there.
(with modified PCB layout) offcourse.
Since I have to use the 2 512's the 1024 
offers in series.
If this by any means wont work can anyone
please let me know now before i jump start
this thing and finds out that, hey this didnt
work out so well.
Thanks guys & im still open for your 4096 chips
you got stuffed in thoose armor safes.

/ Andreas H