Just wanted to know if the new wiper arms have splines where they attach to the spindle. Looks like mine are stripped out.

 

They should have them on there. I said forget the garbage arms on my DII and bought some DI arms and they have been leaps and bounds better.

 

why are the D1's such an improvement??

 

Well my springs on my stock wipers had terrible pressure. The DI have much better spring pressure plus you can use a lot more wipers. I found my on ebay for $30 mint condition. AB has a kit.
It's a good investment if you live in a place that has a lot of rain/snow. I was tired of my DII wipers missing a large section on my windscreen when I was driving in the snow.

install video not sure why I am linking it