Forgive me for a rather tardy response.
I have added a top note flavoring, but not recently. I do not recommend applying spirits directly to tobacco. If the alcohol has not fully dissipated you'll get a very hot burn and could ruin a pipe.
The most accepted manner to add an alcohol top note by home blenders is this:
Fill a shot glass of spirits.
Place it in the middle of a tupperware style container, tall enough so you can tightly close the lid.
Depending on how intense you want the flavoring will determine how much tobacco you surround the shot glass.
Once you snap the lid, keep it closed for about a week.
After a week, see how much of the spirits have been absorbed.
Move the tobacco around the shot glass, bottom to top and re-seal the top.
After another week, take a good sniff of the tobacco. If you see that the level of spirits is down and the tobacco is fragrant, smoke a bowl and see if you need to refill the shot glass and allow the tobacco to absorb more of the spirit's essence.
An after thought. The drier the tobacco you place in the container, the more readily it'll absorb the spirit's essence. If you use a tobacco loaded with a humectant, absorption will be slow or may not occur at all.