What are the steps and requirements to obtain a Non-O visa in Thailand, and how do 90-day reports work after leaving the country?

A long story and a couple of questions.

Just want to share my Non-"O" experience at Chiang Mai Immigration because I find this forum quite helpful.

Arrived from Canada on a 45 day stamp Nov.2nd and wanted to apply for a Non-O. Had to do one 30 day extension first (1,900). Don't know why ($maybe) but done.

As required for my Non-"O", on Dec. 23 I finally provided the following documents over a number of visits. Busy place.

1. TM87 Application for Visa. ✅

2. Copy of passport details including the 30 extension stamp. ✅

3. 4*6 cm photo ✅

4. A very non-committal guarantee letter from the Canadian Consulate for IIRC 1,000 baht, saying that I've shown them documentation and signed an affidavit stating that I meet the 65,000 baht/month income threshold. They requested Immigration "afford me assistance as may be necessary". NOTE - The income did NOT have to be deposited into a Thai bank at any point. ✅

5. A signed acknowledgement of Penalties for a Visa overstay form. ✅

6. And last but not least a 2,000 baht application fee. ✅

My call-back day for consideration was today (Jan. 13th). I got my Non-"O" valid until April 11th, yay! Was told that I could renew/extend up to 45 days prior to that date and be given a 1 year visa at that time requiring 90 day reports (another 1,900 baht I assume) which I will do.

QUESTION - Assuming no issues arise could I buy a single re-entry permit, leave Thailand on April 19th and not return until November and the visa still be valid? Would the 90 day reports kick in again at that point or am I knackered?

The end, almost. When I left Immigration someone had liberated my motorbike helmet and I got a ticket on my way to the shop for a new one. Some days just go like 😔.

Cheers!