My new custom tube, longer rod and more adjustable back plate has finally arrived. What a difference the funnel makes at the bottom of the tube - no more worrying about whether the end of the tube and cage are going to create a sprinkler effect. Thanks @Chaste Nole for linking your custom tube and I can recommend this design to anyone who has issues with spraying when 'stuck' in their BBCS.
Thrilled that you like it - the more I am in my custom BBRZ belt, not sure how others get by w/o a funnel type tube. No spray really makes living in the belt long term feasible and pleasant