Yes, I also have the Lainé, to check my memory.
---1---There are some rules to know:
-- Guard, Leib and Grenadier: Busch (except for Bavaria).
-- Artillery and Bavarian cavalry: Busch.
-- Dragon and Train: Busch.
-- 108 Saxon SR, Busch, even in the field.
etc...
---Remain special cases :
-- 145 K.I.R.
-- Fusilier-Regiments: some but not all.
etc...
---2---Colour :
---Busch white for the 1st and 2nd Battalions of the Guard Regiments, black for the third.
---White musk for some Grenadier-Regiments, such as the 109 Baden Grenadier, but black for the 115 Hessian Leib.
---Red for the musicians and for the Bavarian Busch.
---3---Quality :
---Crin for the troop.
---Horsehide for officers until 1896 then Buffalo or Yak for officers.
---Cock's Feathers for generals.
---4---The year of attribution :
Some Buschs, such as KIR145 (King) or KFR 86 (Queen), were only issued after 1895.
So the Lainé, for example, gives the situation in 1914. It has the advantage of reviewing all the regiments, one by one, at that date. On the other hand, Jean-Louis Larcade gives details of the quality and date of issue.