What are the requirements for applying for a NON-O visa in Vientiane, Laos including the financial aspect?

Has anybody had recent experience of applying for a non o visa in Vientiane, Laos? I plan to do it next month. I topped up my UK bank account with the ฿400,000 equivalent amount this month. Does this money need to be 'seasoned' the same as is the case for yearly extensions done inside Thailand? Or do they just want to see you meet the financial requirement of 400,000 baht equivalent by providing a bank statement at time of application? Thanks in advance for helpful responses.