Fixed the time inconsistency (get more or less no effect on the smelt speed before).
Using newer event to set the time so you can only change burn time on 1.17.1 and up. Older servers will use default burn time (if requested I will look for a solution).
Fixed problem when wrong item is the result for the vanilla recipe.
Added option to prevent similar vanilla recipe to the custom recipe get smelted.
Thanks to several people that requested more options get added. This plugin should already work on 1.21 but can give some nbtapi errors (will be fixed in next update).