தனிச் செய்யுட்கள்

[sankark]

... if the last feet can be just made into கூவிளங்காய் x 2 as long as its aslo sensible in meaning, it is a great template for venpA

Yes, with the addition of நாள் or காசு in the end to ensure the mandatory வெண்டளை.
(மலர் or பிறப்பு may not be suitable, as it would result in கலித்தளை.)

that's true. my point though was about the last கூவிளங்காய் itself can be just split to கூவிளம் நாள்(காய்), not even காசு, and so no 3rd அசை either. ofcourse iff it makes sense!

[Pratyaksham Bala]

.
Yes. Got it.
You will get இன்னிசை வெண்பா.
Great !