Glass bottle etching

After successfully etching some glass panels I decided to move on to some bottles. I had to remove the tray and make several measurements to try and get the desired focus height (it didn’t work) The bottles I had where too large to fit under the head and in the focus range of the laser… but it worked anyway. I measured my tray depth to be 1.349' so max focus height is 1.849' and my bottles are 2.23'… not in range. I wanted to try anyway so using my previous settings of 950/100% and lines/inch of 340 I got some pretty good results. Couple of comments, the glass was wavy so further variations in the required focus. I didn’t use any soap, oil, or coating for cooling as the glass was rather thick. I did have to clean up the etch with my fingernail, but it still came out as desired, cool.