As I am working I often think of things that are not that obvious that may help others.... As you know regardless of the glue ....epoxy, pva, or plastic resin...there is a settling of the glue in the joint once it is engaged and clamped. Because each joint has a bit of slop the best position for drying is in the position the piece will be used. For example , for a table a stretcher to a leg should be set with the leg verticle....this insures that the bottom of the joint has good adhesion.. The lower part of the joint is the weakest and is the tension side for most stress. The upper portion is often in tension unless it is moved laterally. So the upper part of a joint is uually pushing against itself....stretcher against leg...
Veritcle Free play is ok on the long grain to long grain side of a loose M and T joint....about 1/16" vertically will allow you to tap the joint flush at the top and reduce any planning after. The long grain adhesion takes most of the stress and develops most of the strength. The lateral free play should not be excessive ...the joint should fit snuggly...I use a small mallet ant tap things together