Lightsheer ET

I looked on the forum and found some very helpfull information but I want to ask…
I am a skin type III and have been using the lightsheer ET for a while now and am not very happy with the results.
The settings I have been using are 100 Pulse and 40J. I dont burn with these settings but I will have some minor blistering for about 24 hours.

I am a male treating my forearms, chest and stomach. hair is dark and course.
how long b/w treatments and should I up the pulse/J?

thanks for the reply. I didnt even know you replied back till just now.

I have tried auto and 30, but that seemed to give me marks/burns, And Hyperpigmentation. The Hyperpigmentation went away in about 5 months, and of course was not fun! so I am a little nervous about those settings. I usually wait about 1 month between treatments.
What do you think?

I tried to upload a picture but it didnt work.

I might be type a IV skin. I am of french, polish and german decent.

Once I treat the area I am usually hair free for about a month.

The hyperpigmentation came from the burns. I think what happend is a burnt hair was stuck/melted to the hand piece and it caused burning everytime the laser shot.?