I've never used coir mat liner on my vanda baskets preferring to train (let) the roots hang through the slats in the basket. I use plastic cable ties to anchor the base of the plant to the basket and as needed on the fan; occasionally, I'll use a few wine corks or chunks of charcoal or lava rock to guide the plant into a natural upright position. Eventually, roots anchor themselves to the basket.
As long as your new potting technique allows for good air movement and drains (while retaining humidity), you should be ok. Just be cautious about any 'salts' that may build up on the coir.
Will look forward to seeing your results. Vandae are beauties!
|