Stew , try the water pick ... you won't have to worry about whats left back there you'll be more concerned about what used to be there !
Mine water valve is adjustable for pressure . Little or as much as you want ? Some of them have warm and cold with built in dryers . In the USA we've been so deprived for so long !
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I can't picture how the Squatti Hole could work ???
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When I was a 2nd grader I lived with my grandparents for a year (1959-1960) . They didn't have running water or electricity , but they did have magazines in the out house with the slick paper. The mail man just kept bring more all the time --- even in 1959 !
Once a week (Tuesday , I think) the traveling store guy would come around in his old 1 ton truck selling coal-oil , sugar , coffee and such. Granny would trade eggs for her stuff she wanted. Hard to believe but its 100% true. 1959-1960 rural Tn.
Wood cook stove and all , they thought it was normal ...
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Come to think about it ... one Sunday News Paper could solve the T/P problem for a month !
but
I wouldn't flush the shinny paper !