The wedge will have to have an ND3 filter installed - not a case of either/or. You have to have one.
Will say I would expect the Baader to have a permanent one installed - giving you no choice or option but keeping your eye safe.
After the wedge you can put in a variable polarizer if you wanted to reduce the intensity down more - it would be at around 1/20,000 of the incoming at this stage. 1/20 for the wedge and 1/1000 for the ND3. An ND5 front filter is 1/100,000 so the wedge and its filter is some 5x more then a Baader solar film filter on the front.
Another good item is a continium filter that passes through at the 540nm range so green in appearance but the sunspots are supposidly more detailed. Never found I use enough magnification for "big" sunspots and there is at present precious little on tne sun anyway. Slight hiccup of a continium filter is the cost, they are not inexpensive for what is a green filter.
You may want to get a UV/IR cut filter in there. Sort of extra protection and if doing outreach nice to be able to say one is installed.
From memory I do not think you will necessarily need a "finder". Sure the Baader projects the image of the sun on to a rear screen with a cross on it. You manouvre the sun image on to the cross and the sun should be central in the scope/wedge setup.
Just remember it is still only a "white light" image, not the detailed Ha or CaK.