i'm posting this follow up to help anyone new.
its a ton of work , but i feel very usefull in
organising ones approach to each new song.

step 1. i use a lined excercise pad to analyse
with comments on every different instrument in
biab. with its id.
step 2. each pad page has a seperate instrument.
eg flute or piano or whatever.
(in some cases eg pianos or guitars you will need
multiple pages whereas washboard just a couple
of lines. so maybe a misc page for washboard
and others like koto etc.).
please note the real tracks library shows all the
various instrument names.
anyhoo back to the lined pad.
step 3. for each page of instruments i draw a vertical
line down the middle with two headings.
instrument id (eg 763 clarinet) and comments.
(eg ok /vnice/wowser/standout whatever noting the
tempo. i DO NOT observe ONLY biab recommendations
from pickers, cos ive found this my own method.)
so you end up with a ton of pages of instruments
with comments. laborious but highly worth it
listening to each instrument/id and commenting
both in solo and with band example.
step 4. thusly lol, when i approach a new song i get out
the trusty lined pad and flip through it to help me consider
my approach to the song.
lol its sorta like interviewing a lot of session musicians.
to see which ones can i use to make this song the very best ??.

some might say well thats a TON OF WORK. phht !
i'm sorry but songs ARE WORK. a ton of work.
hours and hours of trying different things.
ya gotta put in the creative time.
thats how breakthroughs work.
i urge everyone to try this method cos this way i dont miss
usefull instruments unlike useing just the pickers.
and i get lots of ideas like hmm what is a charango ?
and what can i do with it ??

hope this helps someone.
create your own lined pad of "song backing musicians".
its also a great learning excercise for example ,
wow could that flugelhorn be usefull as an intro to my new
metal rock song lol. or that harp be a nice intro before
the whole rock band blasts into action ?
i'm haveing a ball.

toodles and peace.

my songs....mixed for good earbuds...(fyi..my vocs on all songs..)
https://soundcloud.com/alfsongs
(90 songs created useing bb/rb)
(lots of tips of mine in pg tips forum.)