It can be done but its a little tougher and requires more patience than other vapes. Sloooow draw is the key, but the LB isn't really made for that. Other have done it, youtube might give you some better insight on techniques
You know, the problem with micro hits on a bong is that the water shoots back up the downstem, causing some air to be pushed back into the box, and vapor escapes through the intake hole.
from the few videos i've seen. The person hitting it seems to watch the vapor appear in the box and clear it with a slow drag in the bong and waits for the box to produce vapor again... so maybe like a pulse technique from a bigger spectrum? Your better off asking this question on Fuckcombustion.com