for payments in installments, it should be possible to specify different durations for each payment. example: the first payment one month, one month second, third 10 months. and this, in order to allow to 3 or 4 payment for one year. This allows for the credit on a product sold in years.
can you install it? because with the crisis, the payment in 3 installments can make more sales. and right now, this is not a luxury.
You can set first amount to charge + any (configured) number of rebills for second amount. I do not not see any advantage to make it more complicated and less compatible.
in fact, it would be nice, it would be able to select the second payment in addition to X times the second payment to select a different period for the latter. Thus, we could do three or four payments and utilsier to finish the last one year complete. Actulement, it is possible to do this for two payments. The first for one month, and the second for 11 months. It would be nice to make 1 first payment, X times the second, and the last of juse add the number of months to finish the year.