Well i've done another etch which worked ok. I used ammonium persulphate as the etching solution. I feel this worked better than the other solution i used. The only down side is that i have to heat and keep it at about 70 degrees. Something i will have to work out. I'm thinking of having the solution siting in a small contaner of hot water to keep it warm. I'm still going to have to make a small spray tank for etching. The dip method just doest cut it for what i want to do.
Got another shapways order, which once again prove to be a miss print again. I'm working with shapeways now to sort out what went wrong. You can see in the photos below that the ones on left are good which i had done earlier this year and the parts on the right are the bad prints. Notice the blur along the straight lines and over print on the parts.
Here some photos of the semaphore signals ive been working one. These are nearly ready for realese. I'm still having problems with the bend in the mast. I think this is been caused by the ladder pulling down on the mast when it is cured in the oven at shapways. Some more testing to be done.