Hi Jan, i have an Iwata hpc plus. Bought it on Gumtree for half price from a lady who did not know how to use it properly. I do not know what needle and tip size it is. It is only good for small detail, and it regularly frustrates me by not spraying properly, no matter how much the paint is thinned. A really good clean doesn`t seem to help. Maybe needs a new part. I am reluctant to spend money on it as Iwata parts are expensive. I have 2 el cheapos bought on line which work fine most of the time , and can be replaced for $25 to $30 if needed. I was even able to get replacement parts for one for $5.00. Also have 3 Paasche double action guns which work all the time, no matter what you do to them. Excellent quality and craftmanship. I`ve been lucky with them. My first one was given to me by my airbrushing son-in-law. One at a garage sale still in box never been opened $25.00.
. And another older one in a mixed box of air parts , hoses, etc. for a $2.00 offer. Gave the airbrush a clean up and it`s as good as new. Anyhow Jan, that is my experience with an Iwata. I thought i would never be lucky enough to own one, and when i got one i was disappointed. I`m blaming the brush, but maybe it`s just me and the flaming hot weather plays havoc with dry tip. I`m on the Sunshine Coast Qld. cheers.