I have no recommendation on the 93. Only Renix.
Contact info: trevor.skankfootracing@gmail.com
https://www.facebook.com/Skankfoot-Racing-100901878066960/
So, maybe the original injectors weren't flowing enough because of age or something, and the ones you installed are flowing too much.
Perhaps a nicely refurbished set of stock injectors or the equivalent 4 hole injectors would be a wiser choice.
No. There are other options.
And, a scanner will not detect the things that my Tips cover. nickintime makes engine monitors.
His info is on the first page: http://cruiser54.com/