Hi RD_3D.

For a 1mm extrusion width, you should have a larger nozzle- do you? Or are you over extruding from the .5 to make a 1mm wide path?

I dont know what version of Repetrel and firmware you are on, but the latest is always available from http://hyrel3d.net/downloads

In this version, you can go to File > Import > Slic3r, Default Recipes > ALL Recipes and the most current recipes for the .5mm nozzle at .1, .2 and .3mm layer thicknesses will be installed.

Spiderwebbing is reduced (or eliminated) by increasing the prime and unprime steps and/or dwell time. To save these settings, go to the last tab (soapstring), right click on the "Flash" button, and accept to write new default settings to be stored on your print head.

I am available to skype/teamview with you to help with an upgrade or troubleshooting. If you will send me your stl and gcode, we will take a look at it.

Please let me know how I can help.