As far as DLM reset goes, I made the request, mentioning a new more stable modem. Here is the reply from Slingshot customer service:
"I understand you would like us to re-run the DLM. We do not have control over the DLM and can't reset it, however, every 10 days, the profile will change (if required) to adjust to your connection taking your modem into account".
Thanks again Slingshot.